Hp Tuners Rich Idle

Completed my 1st Tune for a Stock LS1, A4 1998 Camaro SS. Holley HP 650 rich idle no matter what i try Car is always sluggish on restarts which I believe is due to it being so rich at idle and cruise causing the plugs to. Idle Air Control (IAC) Valve. While the car was torn apart I also upgraded my HP Tuners to take my wideband input. Please read this document carefully and use at own ri. With Economy preset tune, the tuner ramps up the A/F ratio by telling the Electronic Control Unit a fuel rich status in those driving circumstances when engine power is not fully exploited, like at idle or low speed cruising in traffic jams, shift times, parking, reversing and constant highway driving at moderate speed. Engine stalling can be dangerous, because power assistance is lost to the steering and brakes. How do we adjust an engine’s idle speed? In the past, adjusting an engine’s idle speed was easy. 6:1 AFR during the first WOT run, the jets were up-sized to try and get the air-cooled engine down into the 11's. Changing the fuel pressure on an EFI System is an effective method of affecting engine performance and making more power. Only thing i did to my car this winter was port the throttlebody and manifold. The car is running ID2000s, the new walbro 400lph pump, maxwell power fuel rails (-6 I believe), aeromotive fuel pressure regulator, PTE 6262 turbo, built 2. 0L mill was engineered to pump out an impressive 145. Carbureted engines can suffer problems as well. Use the tach to help you adjust the idle mixture screws evenly to create the highest idle speed. Compatibility for the 6. Your idle adjustment screws should be 1-1/2 to 2-1/2 turns out from full lean. IDLE TUNING The following is a collection of idle tuning notes, tips 'n tricks and How-2's for idle tuning a big cam (or any cam for that matter) that I used when dialing in my 248/254,. Some engines with hot cams will require an air/fuel ratio as rich as 12-12. Run the engine only at idle or fast idle, but not over 900 RPM while spraying into the cavities. I managed to get my idle pretty good but thats a lot of fine tuning the raf table for it, anything under straight below 0kpa is still rich regardless of what you do, mine comes good again around -15-20kpa but the -15 to 0kpa range wont come good no matter what. Are there any reputable tuners + or - 100 miles of philadelphia that anyone can recommend?. Repeat until no further idle speed increase is observed. Now enhancing these to new heights with a new feature rich VCM Editor and VCM Scanner, coupled together with the latest generation MPVI2, this is only tuning and diagnostic solution you'll ever need for your modern OBDII vehicle. Thanks to LS1 Edit software, Sam has access to around 4500 tables inside the factory PCM. Now I can concentrate on WOT tuning. I spent a good month reading, looking at other tunes from the HP tuners repository and making my layout before I started tweaking my tune for the headers I installed over winter. offroad h-pipe with o2 sensors plugged in. Before we clue you in on how Barry Grant has come up with an innovative solution to this classic big-cam, off-idle stumble-let’s get into why this happens and what carb-tuners up until now have. hey guys i need a little help. Holley EFI, 550-835, HP EFI Multi-Point Fuel Injection System - jeep. I had a dyno tune and the tuner added alot of frequency to the maf to supposedly get the afr into the mid 12s. Having run at 12. There isnt much you can do to fix your problem. Try to set the speed at about 2700 RPM. HP Tuners GM Gen III part 18 takes a look at how the throttle follower and throttle cracker tables interact with the idle control routine. When I first started SD tuning, it would ask me to remove 14-16%. I wanted to start this because I see so many people tuning E85 as if it were race gas. Under Fuel Cutoff/DFCO set DFCO enable temp to 493°F & disable temp to 493°F. I couldn't even leave the driver's seat because I had to work the throttle to keep it alive, it finally died a little over 7 min, when I tried to let it idle. Set the float at exactly 9/32". - - 1989 Mustang GT, rich and eratic idle Failure In PCM Internal Voltage (R), Erratic RPM During Hard Idle Self Test (R), Failure in EEC reference voltage. The carburetor will also deliver the optimum air/fuel ratio throughout the engine’s RPM range to achieve peak horsepower and torque. The proper idle speed for Big Twin engines is 900-1000 RPMs. Manufactures have removed these. This is where tuning the Injector End Angle toward a negative value can be very beneficial (and not just at idle). Thread: 2014 Ghibli s q4 idle issue, rich fuel code. How can you tell if an off-idle stumble is caused by a lean or a rich condition? A carb running rich, as well as a carb running lean, can cause an off-idle stumble or hesitation upon acceleration. i want to make the timing more stable like 22deg btc an then by full boost in like 3rd or 4th gear start retarding it so i dont get into detonation. Plus I am anal retentive when it comes to how the car runs & operates, I think i was pissing off my previous tuner by being very picky about drive-ability. Check to see if the O2 sensor responds correctly to rich and lean fuel conditions. But the issue I'm having now I have been fighting for a few days. If your idle circuit is rich, leaning out the jets is just band aid. I had a dyno tune and the tuner added alot of frequency to the maf to supposedly get the afr into the mid 12s. 200 is leaner than 1. The stock tunes on these cars are very rich,when I was having exhaust problems the tech at the dealership showed me alot of info while running the witech to check some things out and he showed me that the left bank was adding 9% fuel and the right was adding 15% as well. I tried every idle setting/throttle cable tension setting possible. 5L with stock cams, and stock ECU, E85. 5, battery volts are a steady 13. What should idle airs should I get 110or 115? Please I need your help so I can buy today thanks ! timing is 28* full advance / 8*idle _____ 74 super beetle. Some engines with hot cams will require an air/fuel ratio as rich as 12-12. I did the idle trick in about 65-70 degree weather with no difference. Yea my ride is running badly rich. Carbureted engines can suffer problems as well. 289 with 4 bbl holley running rich when warming or idle So I have a 289 mustang with a 4bbl holley 4150, and it runs rich when warming at idle and manual choke is on. Either condition may be severe. 1989 mustang gt running rich and rough idle on start first thank you for this great site :worship learned a lot and saved a ton of dough fixing problems on my own by searching the threads. have any of you guys with turbos started tuning with hp tuners? specifically can you adjust the timing advance wherever you want it? on my scanner my timing is all over the place, it goes down to like 13deg btc. leaning out a Holley HP at idle. To find the optimum fuel curve for an engine running on the dyno, you should experiment with richer and leaner air fuel mixtures at incremental steady state test points (e. It already had 60lbs injectors but the stock pulley. 0-liter four-cylinder, creating an extremely rich idle and forcing us to idle in open loop. That threw me way off. com Holley EFI, 570-214, Idle Air Control Motor - Jeep Factory Outlet Store Free Same Day Shipping* on all orders $50+. In a 4150 like a 750 with a 3/16" T-slot that would give a very rich mixture screw. 0L,I had a CEL light for a P0430, Catalyst System Efficiency Below Threshold (Bank 2), and my RPM's would not go above 2500 unless I floored it. I took my 92 evinrude 9. Sometimes the motor will stall. The tuning school takes a slightly different approach to tuning, at least with forced induction, than some folks on HP tuners. What I thought was a vent though was one of the. For mild cams, an idle ignition timing advance of approximately 16-18 degrees will do. The result is that the car will run very rich at idle, and the idle mixture screws will have little effect or response. What is HP Tuners? HP Tuners is an ECU tuning device. 622", 112 LSA using HP Tuners. 200 is leaner than 1. Claims in HP-Boost mode. The decision has been made, and I'm sure the original poster will be very happy with a new 150 hp Yamaha. Tuner Registered User Join Date: Feb 2006 Posts: 2,032 Try changing the position of the closed butterflies. However, there are many do’s, don’ts, and rules of thumb that can be frustrating to learn the hard way. 8 so I decreased the ve in my idle map but no matter how much I decreased the ve it stays rich. Now enhancing these to new heights with a new feature rich VCM Editor and VCM Scanner, coupled together with the latest generation MPVI2, this is only tuning and diagnostic solution you’ll ever need for your modern OBDII vehicle. I took the car out for a drive, the engine seems to idle ok but as soon as i input throttle, the engine leans. 2005 - 2014 S-197 Mustang -General/Talk-2005 - 2009 Specific Tech. Idle AFR too rich but can't reduce injector pw Member Login. This is no big deal though, for if you get a hold of the HP Tuners MPVI GM Pro kit, you can connect up to 4 analog inputs to the interface and the data from those inputs can be logged along with the factory parameters obtained through the OBD II port. Only thing i did to my car this winter was port the throttlebody and manifold. 2015-2016 3. I don't have a wideband to see how actual rich it's getting but the injector pulse width is going up at the same time the computer is commanding the rich AFR, I can also feel the truck starting to idle real rough while this is happening. BTW here is a link that will help you become familiar with HP tuners. That was done to specifically illustrate that air temperature was not being factored into the airflow estimation. Get help with a tuning job and opinions on tuning strategies from experienced tuners from around the world. Performance Modifications. Should you have hit these un-tuned cells in real world driving on the street, the car would be rich and stumble. HP Tuners at Summit Racing. To narrow it down, tap the roll pin out of the accelerator pump lever by using a small pin punch or a small finish nail. I was told it could be something to do with the evap purge system. Allows nine easy-to-program adjustment points for both the fuel and ignition maps. LTFT's are always negative, meaning the car is adjusting for a rich condition? - During cold start, they are about -11% vs -19%. E38 Gen IV Corvette – EFI Tuning Class 3 E38 Gen IV ECM Class – Curt Miller begin the scan. The car has a very rich idle, around 10. After repairing the splice, the engine idles is smoother and does not cycle between rich and lean. When I first started SD tuning, it would ask me to remove 14-16%. The result is that the car will run very rich at idle, and the idle mixture screws will have little effect or response. 5:1 for a smooth idle, while others will run happily at 13-13. This is no longer necessary. 3 to 1 compression. Back to the Tech Page. Running rich is if u want to race often and change oil regularly. Starting with a known safe AFR value (rich fuel map, jet, or mixture needle setting) record the Hp, temperature, and BSFC values. Idle The PCM has a number of parameters that influence the idle behavior of the engine. Engine stalling can be dangerous, because power assistance is lost to the steering and brakes. Occasionally the idle jet (the small tube pressed in the bottom of the cluster) is different left and right and sometimes the idle jet larger than necessary, resulting in a very rich off-idle. Once the car is warm, between idle and 3,500 rpm, they are usually -4% vs -14%, but are never equal, although they do come close to each other a lot such as -7% vs -12%. Compare CD1 MSD and Crane Ignition Boxes Click images for full size. Should you have hit these un-tuned cells in real world driving on the street, the car would be rich and stumble. HP Tuners, the home of VCM Suite and the MPVI since 2003. 0 bought used 4 months ago. For the moneyget a Dobeck. By properly I mean all loads are adjusted to be accurate. Get help with a tuning job and opinions on tuning strategies from experienced tuners from around the world. What should idle airs should I get 110or 115? Please I need your help so I can buy today thanks ! timing is 28* full advance / 8*idle _____ 74 super beetle. the good thing is that the car turns on and runs. 122 but it would idle at 2. Running too rich - High negative fuel trim corrections can be caused by MAF sensor problems, high fuel pressure, leaking fuel pressure regulator diaphragm, faulty evaporative emissions components, leaking injectors, defective O2 sensors, exhaust leaks/pinholes before the O2 sensor, coolant temp sensor problems, and base engine issues such as low compression and incorrect camshaft timing. At this point you can sit happy where you're at or you can determine whether or not the idle speed can come down. But, I had this same 'extremely rich' (10:1 or 11:1) cold startup issue that everyone else is having. They come pre - programmed for a Stage One setting for Indians and thats about all the average person needs. The AFR at idle is 12. Idle speeds below those specified by the manufacturer will affect the performance of the power steering pump, alternator and AC compressor. Far too long tuners have had to settle for what ever the controller manufacturer provided, far more often than you would think this means a clunky user interface and minimal feature set. Idle The PCM has a number of parameters that influence the idle behavior of the engine. Join the thousands of Powerstroke, Duramax, and Cummins diesel truck owners. Since Fuel Injector Clinic had also provided us with the option of using their "smaller" 1,650 cc/min injectors for our Evo X, we opted to stick with those. Thread: 2014 Ghibli s q4 idle issue, rich fuel code. offroad h-pipe with o2 sensors plugged in. Then it's very rich and stumbles around 400-500rpm. welcome to another one of our webinars where today we're going to be talking about idle tuning in GM vehicles using the HP Tuners software. Otherwise we will be dealing with just two idle mixture circuits in the primary metering block. Volumetric Efficiency. Now enhancing these to new heights with a new feature rich VCM Editor and VCM Scanner, coupled together with the latest generation MPVI2, this is only tuning and diagnostic solution you’ll ever need for your modern OBDII vehicle. This is no longer necessary. Power Vision FAQs; Power Vision CX FAQs; Videos. Data logs are where you learn what you tune. Regarding the VE tuning, that is a problem with trying to learn stuff from a forum. Performance Modifications. The carburetor will also deliver the optimum air/fuel ratio throughout the engine’s RPM range to achieve peak horsepower and torque. 900-950 is good for cars with aftermarket cams. Alos, the car is going to be running rich. However, performance fuel injectos are electronic solenoids and cannot be held open for too long or it will overheat and fail. The carb is about 20 plus years old but runs fine once on the road. The fueling accuracy is much better at all loads if a mafless tune is done properly than can ever be provided by a maf tune (see the Maf section below). Ran kinda rich at idle and low speed too, but more or less normal for a BG carb. A limit of 5% per rpm bin drop in VE has been applied to prevent the extreme drop-offs that can occur at high rpm & kPa when VE is modeled in this way. If you don't understand exactly what each of these events are and how they occur, you won't know how to prevent them from happening, or possibly even recognizing when it happens. - For cruise and idle situations a value of 14. Set the float at exactly 9/32". My recommendation: don't use a single plane intake on a street driven car unless you have a lot of cubic inches and you're willing to put in a lot of time tuning the idle transition. 0-liter four-cylinder, creating an extremely rich idle and forcing us to idle in open loop. To find the optimum fuel curve for an engine running on the dyno, you should experiment with richer and leaner air fuel mixtures at incremental steady state test points (e. Rich After Reflash Solution - GM Reflashing HP Tuners High Performance Academy How to avoid staying too rich at idle: HP Tuners Target Idle Tuning for Mild to Large Camshafts | HP tuners. In the native HP Tuners file format, or by exporting the data to a comma separated file. manual trans 196,000 miles. To do so you need to go to Go EFI Tuning, then find and select Idle Control. The engine will idle at about 13. O2 Sensor Help with HP Tuners! This is a discussion on O2 Sensor Help with HP Tuners! within the Computer & Tuning forums, part of the LSx Technical Help Section category; Alright guys well i have been having a problem with my bank 2 sensor 1 O2 sensor. There is a lot of information. Disconnect power from the ECM for at least 10 seconds to clear codes (in case any are present) and reconnect the IAC electrical connector. HP Tuners, the home of VCM Suite and the MPVI since 2003. After the second run on the dyno, the air/fuel ratio was now at 12. My Akra map was originally loaded at about 100+ degrees. 5L with stock cams, and stock ECU, E85. best time: 11. On the 4150 HP models that do not have a choke tower the list number will be stamped into the mainbody behind the throttle linkage. A carburetor has an accelerator pump, idle, main jets, and in most cases a power system that is designed to supply the correct air/fuel mixture for the engine's demands. After repairing the splice, the engine idles is smoother and does not cycle between rich and lean. How to use HPTuners. Ive found that larger bleeds seem to sign off early,before the main jet starts to work,but if you up the MAIN or High Speed bleed. Application: GM V8 based vehicles. The carb is a Holley 850. (Idle speed is pre-set at 1,000 rpm. 4l sohc modular 3 valve 8 cyl. HP Tuners, the home of VCM Suite and the MPVI since 2003. It lays out information in a very easy to read display with all of the parameters that we need to look into. 5 afr wot is good 11. 15% gain in HP and torque. That threw me way off. Initially had holes in all throttle blades, wouldn't idle under 1800 RPM with idle screws all the way out. John kept his 500 until he retired and moved to the coast in 2005. I don't know how much is too much, but I just kept adding 1 to the row, and car idles NICELY now. 5:1 for a smooth idle, while others will run happily at 13-13. When I went into hp tuners I was able to turn off ltfts. About – HPTuners. Hg lower than the engine will have at idle. In addition to the mods you mentioned I would make sure the carb has a hp needle/seat (at least. com HP Tuners, the home of VCM Suite and the MPVI since 2003. Handheld tuner boosts hp and torque for better daily driving, towing, and off-road performance. HP Tuners, the home of VCM Suite and the MPVI since 2003. Idle AFR too rich but can't reduce injector pw Member Login. Because there is a relatively large amount of air bleed in the over-all circuit a relatively larger idle jet is necessary to get curb-idle screw sensitivity as desired. 0 (stoic) will be ideal. I scanned my car today with vcm suite 2. True HP dyno chart. Recently my car started running very rough. 7 Cummins is available for both 6. and air adj. oh if only Inovatemotorsports' web furum was still up IDLE AIR bleeds useauly end up in the. Fluctuations in engine idle speed can be annoying and may even cause stalling at idle. Rich Idle FIC 1450 injectors It started up fine but pig rich with AFRs at 11 - 10 I tried the ID 1700 dead times with gm hp tuners data. I have a ls 3 525 hp crate motor I purchased from the chevy dealer I have only started it maybe a dozen times i have noticed that when I'm in my garage that in a couple of minutes it just smells so rich u cant stand it someone told me these 525 hp motors run a cam that holds intake and exhaust valves open at the same time and that's why u smell that raw fuel they said it was a circle track cam. D16z6 turbo 300hp hondata v3 I installed my new wideband aem and I'm getting rich idle 11. Gen III - Speed Density VE Table and MAF Tuning Instructions with a Wideband O2 Sensor Create by 69lt1bird – Jeff Anderson 1 These instructions are written for the beginner and intermediate user of HP Tuners. BE CAREFUL NOT TO OVERTIGHTEN THE IDLE MIXTURE SCREWS AS THIS CAN DAMAGE THE NEEDLE TIP. It has a rebuilt 5. Steve reported an overly rich running condition and starting line bog at wide-open throttle. I do have experience with 2 different Challengers (2011 w/3. Monitor function allows user to monitor the data from various sensors on the bike as well as adjust idle timing, see engine running time, and self-diagnosis function. One injector is not able to cover the whole RPM range, simply because every injector has its physical limit: the fixed flow rate. Need to remove all the functions not needed for this application, some minor tweaking of fuel mapping, idle speed and being able to set fan on/off settings, transmission shift points, etc if necessary in the future. -The heat factor should not have been focused on as so much of a problem. I have a ls 3 525 hp crate motor I purchased from the chevy dealer I have only started it maybe a dozen times i have noticed that when I'm in my garage that in a couple of minutes it just smells so rich u cant stand it someone told me these 525 hp motors run a cam that holds intake and exhaust valves open at the same time and that's why u smell that raw fuel they said it was a circle track cam. The tuning school takes a slightly different approach to tuning, at least with forced induction, than some folks on HP tuners. oh if only Inovatemotorsports' web furum was still up IDLE AIR bleeds useauly end up in the. HP Tuners, the home of VCM Suite and the MPVI since 2003. The first or second rich diodes provide about 13:1 or 4% CO which is perfect for max power. Pishta, Your question was. Sorry but what can an SCT tuner really do? -% indicates a rich condition. Idle Tuning. Whats happening at the moment, it will idle fine to operating temp, around 80-82, the thermo fans will cycle in and out, AFR will hover around 14. 5) Adjust the idle stop screw so the engine idle speed obtains 550rpm in drive (auto trans) or 650rpm in neutral (manual trans). For most marine tuners, one of the biggest mysteries is how do you "jet" the engine in order to obtain the correct air/fuel ratio necessary for a high performance marine engine, to not only supply drivable horsepower when you want to go fast, but also supply the engine with the correct air/fuel mixture for while just cruising or when idling. Supported Vehicles List. every 250 RPM). Allows nine easy-to-program adjustment points for both the fuel and ignition maps. How to tune your VE table on LS engines with factory ECU with HPtuners. A limit of 5% per rpm bin drop in VE has been applied to prevent the extreme drop-offs that can occur at high rpm & kPa when VE is modeled in this way. What should I be looking at? I can smell the gasoline. and air adj. Now enhancing these to new heights with a new feature rich VCM Editor and VCM Scanner, coupled together with the latest generation MPVI2, this is only tuning and diagnostic solution you'll ever need for your modern OBDII vehicle. Then it's very rich and stumbles around 400-500rpm. I can tweak them exactly as I want. We tweaked this a bit for when the engine warms up. If your idle circuit is rich, leaning out the jets is just band aid. It also equates to a real AFR of about 15 or 16 at idle. I know if you are running slightly lean the computer would add fuel. Target an air/fuel ratio of stoich (14. 5, battery volts are a steady 13. Below is a list of common check-engine lights that can illuminate after the installation of aftermarket parts. Good, but not perfect. I thought I’d be returning it because did not believe the tuner could really do what everyone says it does with boost and gains. Rich at idle help. If i'm in the same map region. The best way to set the idle mixture is to lean the carb out until the vacuum just starts to drop, then richen the mixture by about 1/4 turn. For mild cams, an idle ignition timing advance of approximately 16-18 degrees will do. When the mixture screw is less than 11/2 then the Idle jet is too rich (too large). What is HP Tuners? HP Tuners is an ECU tuning device. HP Tuners, the home of VCM Suite and the MPVI since 2003. Carb builders & tuners Holley 750 HP. IDLE TUNING The following is a collection of idle tuning notes, tips 'n tricks and How-2's for idle tuning a big cam (or any cam for that matter) that I used when dialing in my 248/254,. There are three vacuum lines to it not one. IDLE TUNING The following is a collection of idle tuning notes, tips ‘n tricks and How-2’s for idle tuning a big cam (or any cam for that matter) that I used when dialing in my 248/254,. Now enhancing these to new heights with a new feature rich VCM Editor and VCM Scanner, coupled together with the latest generation MPVI2, this is only tuning and diagnostic solution you’ll ever need for your modern OBDII vehicle. I have tried adjusting the idle airflow up and down without much luck and further tried to tune the over under speed spark and Proportional and integral settings. The LS1 is a high performance engine and there are two main reasons why they can be made to perform so much better: LS1 Engine. After the initial tune, the new fuel press was set around 34# at idle, which I always felt was too low. Below is a list of common check-engine lights that can illuminate after the installation of aftermarket parts. Ive changed sensors like the o2, t. 3 down to 11s) and high idle (1100s) at the same time. Many platforms supported by COBB use a MAF based tuning strategy in stock form. I usually set the Idle Spark control P & D values at P-40/D-60. DIABLOSPORT TRINITY T-1000 TUNER MONITOR 1999-2017 CHevy Camaro 6. We will see how this compares to what the “target idle speed” is set at in the chip. seriously, I wonder how you car REALLY runs under part throttle its probably going to blow up running super rich or lean. A rich fuel mixture (too much fuel for the amount of air in the cylinder) can cause an engine to load up at idle, foul the spark plugs, and also lack power or run sluggish. Let the bike idle for no more than 5 minutes. But, I had this same 'extremely rich' (10:1 or 11:1) cold startup issue that everyone else is having. 3 less fuel, equates to AFRs of dead solid 14 at idle, maybe fluctuates to 14. Idle The PCM has a number of parameters that influence the idle behavior of the engine. I've gotten it to fire up and idle until it's almost warm. and FWIW, when my car was logged and tuned with HP tuners I was sitting there watching walter do it I could even tell you there was seperate tables for idle/main spark haha, and ive only seen the program one time. • Click on the Idle Speed tab at the top. I cruise between 40 and 60 mph around 2250-2750 rpm with my 3. It already had 60lbs injectors but the stock pulley. If you use a small injector, to have a good idle, then you don't have enough fuel for WOT. This is done to control idle speed electronically. The idle mixture screw controls the air fuel mixture at idle speed, and often is located near the throttle plate. If this is your first visit, be sure to check out the FAQ by clicking the link above. It allows you to connect to the ECU through the OBD diagnostic port underneath your steering wheel and edit the values and tables inside your ECU (also more commonly called a VCM by the HPT crew), and basically tune your car to the mods that you have. This is my new interface and I LOVE being able to see my AFR as it lays out across my VE tables. Truck is so much fun to drive. HP Tuners, the home of VCM Suite and the MPVI since 2003. Example showing real time modification of the Base RAF table during idle. I spent a good month reading, looking at other tunes from the HP tuners repository and making my layout before I started tweaking my tune for the headers I installed over winter. These parameters control the desired idle RPM and the behavior of the Idle Air Control (IAC) motor or Electronic Throttle Control (ETC) during idle conditions. 5, battery volts are a steady 13. IDLE TUNING The following is a collection of idle tuning notes, tips 'n tricks and How-2's for idle tuning a big cam (or any cam for that matter) that I used when dialing in my 248/254,. It allows you to connect to the ECU through the OBD diagnostic port underneath your steering wheel and edit the values and tables inside your ECU (also more commonly called a VCM by the HPT crew), and basically tune your car to the mods that you have. I am running a SC tuning from Arrington but I have been reading people who make the switch to HP can squeak out more power and the engine response is improved. I don't know how much is too much, but I just kept adding 1 to the row, and car idles NICELY now. of initial idle. H/P sells engines. Skip navigation Sign in. The first step in tuning your own Mustang with HP Tuners is to make sure you have downloaded and installed the latest beta release of the software. Because there is a relatively large amount of air bleed in the over-all circuit a relatively larger idle jet is necessary to get curb-idle screw sensitivity as desired. how to use hp tuners to adjust a base map tune. Re: HP Tuners for Dummies Transmission Auto shift speed Part throttle shift, Normal-This table is used for part throttle shift parameters. I had two different tuners try to tune the Ford computer and both had the same issues when done. Having run at 12. I'm trying to self teach since the Holley training classes are filled until the end of the year. It has an inline solenoid switch, which permits or interrupts vacuum to the charcoal canister. Correct Timing. ; tuning one table can have impacts on the others. offroad h-pipe with o2 sensors plugged in. Now enhancing these to new heights with a new feature rich VCM Editor and VCM Scanner, coupled together with the latest generation MPVI2, this is only tuning and diagnostic solution you’ll ever need for your modern OBDII vehicle. Horsepower for the little 2. A rich fuel mixture (too much fuel for the amount of air in the cylinder) can cause an engine to load up at idle, foul the spark plugs, and also lack power or run sluggish. Check to see if the O2 sensor responds correctly to rich and lean fuel conditions. Try to set the speed at about 2700 RPM. Your idle adjustment screws should be 1-1/2 to 2-1/2 turns out from full lean. It lays out information in a very easy to read display with all of the parameters that we need to look into. Correct Timing. Hp Tuners Speed Density Tune. An engine that is idling too high may be caused by a faulty idle air control motor valve that has completely failed or that has simply become weak and is not functioning correctly. Most carb manufacturers and tuners. I thought I’d be returning it because did not believe the tuner could really do what everyone says it does with boost and gains. Figure III. GM > Engine > Idle > Idle RPM. Under normal circumstances, the idle mixture screw should be between 2 and 3 turns out. This comes with an iron block and head engine to displace 390 cubic inches, with a compression ratio of 17. Allows nine easy-to-program adjustment points for both the fuel and ignition maps. You can verify this via fuel trims from factory O2 sensors, or via a wideband O2 sensor.