Hp tuners no fuel trims the 3800 does not use the v/e table for transient fuel and will only use the v/e table if the maf fails. Changed the injection boundary + and - 40, ran the motor MAF only, played around with timing and RAF but motor is still pig rich at idle. Anyone have any Sep 21, 2013 · You can accomplish this by logging AFR with a wideband 02 sensor OR by using fuel trims, but with the latter you cannot calibrate WOT operation. There is no way around it. Apr 4, 2010 · You have to get the fuel trims in order first with MAF/VE tuning. You hopefully have driven 100+ miles since configuring your ltft's. Nov 25, 2020 · Having a hard time tuning off of the LT & ST fuel trims. So all fuel control is based solely upon the data in the MAF freq table or the VE table. 1 valve trains, ported/milled heads w/new valve seats, SC, DS and HP Tuners, headers, cat. Thanks. It seems like trying to tune using the narrowbands in this car is about pointless, there are random bank to bank discrepancies, in addition to the two biggest issues I'm facing below: Issue 1: At idle the NB sensors are pinned rich, yet the trims are holding a Nov 3, 2020 · Two (now Three) Hemi's, an 05 5. Just put a nsr truck norris in my 2006 5. 450 and there are no fuel trim readings? Just finished a heads and cam swap on 99 LS1 motor. To do so, you want to get the car to running temperature. If you are going to tune with the LTFT's, reset them prior to your next tuning session through the VCM. You can now truly tune in open loop at this point. 7's are modded almost the same with advanced (10* for Maggie and 6* for the Jeep) FRI Sidewinder cams/6. The other sensor is sitting at like 900 mv (rich), but with a narrowband sensors you really don't have the resolution/accuracy to determine if the injector data is good or bad. Mar 2, 2018 · 2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93 Apr 6, 2007 · C. or possibly they're spitting, funky spray Dec 29, 2009 · Done every trick in the book. Jun 20, 2019 · The cruising trims are still either adding in +20% or removing a decent amount of fuel at times. I have no fuel trim stuck in open loop can someone help? Long story short I recently blew up a built 4l60 and swapped to a 4l80 engine ran fine. In some applications there is a STFT open loop function but does not work when the fuel system status goes to OpenLoop/Acceleration. Then Tools>VCM Controls>Fuel & Spark>Fuel Trim Learn>Reset Fuel Trims. It would be running in open loop only. Aug 13, 2005 · 1: Open up your scanner, do not worry about resetting your fuel trims. My opinion would be an injector issue. 5%. Open HPTuners scanner and hit the space bar. Jul 23, 2011 · Hooked the scanner up to the car today and 02's are stuck at . Actually, the "Fuel Base" (aka "OL Fuel Table") tables are ONLY used in OL. The 5. Runs great. At part throttle or idle, pulling this much fuel won't likely hurt the motor, since load is low. You are going to loose resolution. Replaced o2 sensors, checked wiring, checked pin outs, replaced cpu. 7 Jeep Grand Cherokee, all somewhat modded. 0T. The proportional airflow and integral delay control how fast or slow the O2 sensors switch to maintain stoich in closed loop. So the short term fuel trims and the long term fuel trims need to be turned off as well as the closed loop enable settings. I am not well versed in Dodge tuning, but have experience with GM & Ford. Jun 26, 2016 · Not sure I understand your response, but the flat lined reading is either perfectly set to stoich (doubt it) or the sensor is bad. When tuning with a wideband you can't have the fuel trims workings. GM runs narrowband sensors in these vehicles, the fuel trims generally only work in closed loop. Jun 20, 2018 · Although, short term fuel trim was still kicking in at higher RPM. The MAF trims are very negative 30+, the VE Trims are very positive 30+. Your proportional airflows are super high, the O2 sensors switch back and forth off these airflow modes and control fuel trims. Make sure you don't have the harness on backwards for the o2 sensors. Join Date Mar 2003 Posts 4,860. Let the car idle for about 2 minutes with the … Continue reading How to Tune In Your Fuel Trims with HPTuners → Bank 1 is showing really lean as well from the commanded closed loop, +20-25% on the trims most of the time. My LTFTs are around positive 13. backs, underdrive pulleys, SOS coils, catch cans, 90 mm throttle bodies, plus a Feb 7, 2007 · Join Date Feb 2005 Location Niagara Falls, NY, USA Posts 354 Hello, I have a stage 1 mail tune from a well known shop on an ATS 2. I've attached a data log and find the etc at 169 at start up which should have been a cold start not sure if that's normal. Car seems to run good, no knock, misfires, codes?? Oct 7, 2010 · The O2 trims represent an actual % of fuel being pulled out of the tune, so 20% is 20%. I've checked the FUEL section of the tune but don't find anything remotely referencing fuel trims. 427 DART block with a 244/254 cam. Mar 9, 2008 · 1. It looks like there may be an issue with bank 2 possibly. I change my o2s maybe once a year, I've had a lot of o2 issues before i fixed the issue. The positive trims of +20% are adding that amount of fuel to your PE settings and you may be running pig rich at WOT. HP Tuners Owner. Start the VCM scanner>Histogram display. When you get further into the throttle your long term trims max out at +25%, showing that it's still needing a lot of work to fix the lean condition. 3 I have got it to idle and drive decently, but it is still running rich. I am also running the 24x conversion on a 1996 LT1 and have issues with fuel trims bank to bank acting up. Look at your Knock Retard FIRST. Same here, bad o2s, when I see Fuel Source go into OL FMEM it was the o2 sensor. One could set the "Fuel Base" tables to all sorts of various values, but it'll only matter in OL. You must do a PCM reset by disconnecting the battery for 5 to 10 minutes. Double check power to the plugs, check the pins. 2: Open histogram, and do a nice 0-70 or preferable 0-100mph run. Open loop is pretty good but in closed loop it trims too much fuel off both banks and causes a bad stumble under load and the car goes super lean on the wideband. Bank 1 runs -3. It can't read the fuel at that lambda, STFT are 0, no corrections, then the ECM cuts the injectors. Also, I notice a HP flats out at 5. It's pulling fuel so something in the injector control, data, etc. If it's doing wacky stuff at full throttle, you had better get a handle on it before doing any more racing. Been on the car for 4 months. Fuel trims on this e38 are a bit confusing to me. Without it, one needs to wait for the PCM to relearn all the new fueling (1-2 days driving on my 1999 GTP or disconnect the battery for 30 minutes to force a PCM fuel trim reset). Oct 16, 2011 · Tuning your fuel trims with HPTuners will not only reduce your idle surge but can help to make your car run a lot more consistent. 7 Magnum, an 06 300C SRT8 and an 06 5. Changes to the LTFT’s do not take effect immediately – the PCM requires about 50 minutes or roughly 100 miles to allow for the PCM to relearn the fuel curve. In CL, the pcm attempts to correct to the commanded stoich value through the fuel trims, via feedback from the O2 sensors. Dec 31, 2018 · the car has a jlt intake, airforce manifold, no cats, lt headers and x pipe, and i get system too lean and system too rich codes at the same time :shrug: so i took a long drive with a lot of traffic and a lot of stop and go, in this drive the car was MAF only, at the beginning of the drive i had very big positive fuel trims, then it gradually went to the opposite and started having very big There is no fuel trim reset control in VCM scanner to reset and zero out the stored LTFT's. . When using VCM controls to command closed loop the car goes rich and dies. 2. What's the fuel system setup? Return? Reg after the rails? Fuel pressure? At the end of the log the long-term trims actually go split. Total Trims should be considered when doing both maf and v/e tuning. In fact, you want your fuel trims to be learned at this point. 5K RPM. However, I scanned it with HP Tuners that I now have and have been doing little tuning to my 2016 ZO6. The ability to reset the fuel trims is an amazing time saver. 9% and then Bank 2 runs 15. Grounds are all connected, everything is plugged in, just seems like it wont come out of open loop. File>Connect. * D. I have also checked wiring and swapped o2 sensors, no misfires, no exhaust leaks before o2 sensor, fuel injectors are brand new flow matched, new plugs, wires, good fuel. They can be a pain in the a$$ as they "remember" stuff. Should probably add your throttle position channel and injector information so you can watch that too. It isn't a matter of tuning the MAF or the trims--rather you use the trims to tune the MAF. Is there any to pick up the power from 5. Can someone explain what is going on? Car is an 09 g8 gt. Once you reconnect, all stored LTFT's will be reset and zeroed out. Fuel Flow Rate went right to 0, let off the throttle and got right back on it. 5K short term fuel trim kicks in and rich out AFR which cause the power band to flat out. I'm a BEGINNER tuner and understand air/fuel or fuel/air ratios but tuning by torque is bizarre. 5K and up? I'm assuming it's because after 5. Perhaps I need Harry Potter and a magic wand! Assistance from an experienced tuner would be GREATLY appreciated. Going wide open throttle enters open loop power enrichment and the fuel trims stop working. Hello, new to tuning. pizakn vxmsm uiqc bhijmu mhimy irhz vvvc xoaufor okzcf owjeo nrsvsr pwfxwy haygthg rozoou kjtx