High negative ltft
WebJul 21, 2024 · Each car maker is different, but the general rule is that a LTFT of +25% or -25% indicates a serious problem. Let’s take a look at the … WebJan 11, 2016 · Negative LTFT's with the engine warm, low RPM. In other words, if left uncorrected, the engine would be running too rich. Common reasons for this include over …
High negative ltft
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WebAug 17, 2024 · Recently, about 2 weeks ago, I let the engine idle for a few min as I always do before driving away cold, I got a CEL and it was a P0440. I cleared the code and all was … WebMar 17, 2024 · My Long Term Fuel trims (LTFT) currently sitting at -14% to -10%. I am in college right now, and my driving habits consist of short trips to the gym, Walmart or doordashing (a lot of idling). Whenever I commute home (2.5 hr drive), I can ‘manipulate’ my short trim to make my long term fuel trim reach 0% or -1%.
WebApr 30, 2024 · LTFT refers to changes in STFT but averaged over a longer period of time. A negative fuel trim percentage indicates a taking away of fuel while a positive percentage indicates an adding of fuel. A normal long-term fuel trim reading will appear to stay the same, giving a long-term average of fuel added.
WebOct 23, 2024 · Negative LTFT should produce running rich codes with stock calibrations. Fuel pressure seem high, 55psi at idle, measure vacuum at pressure regulator. Compare with another intake manifold source. ... High negative ltft's. By kissmyss in forum 3.8L V6 Supercharged (L67)(L32) Replies: 10 Last Post: 08-05-2024, 05:02 PM. WebA significant increase in STFT or LTFT from 0% means the ECU is detecting more air than expected and is adjusting fuel delivery with more fuel. A significant decrease in STFT or LTFT from 0% means the ECU is detecting less air than expected and is adjusting fuel delivery with less fuel. A significant increase in STFT and LTFT can be caused by:
WebAug 18, 2015 · STFT usually cycles rich to lean similar to the voltages generated by the upstream O2s. So if your numbers are STFT that are about maximum of the negative side, they are OK. So in retreading your post I'll assume the numbers are LTFT. I'd check the fuel pressure to make sure it is in spec-about 50psi (3.5 Bar) at idle.
WebNov 24, 2024 · Vvt gear, timing chain , vvt solenoid, and chain tensioner were changed. Check engine light is off and vehicle out of limp mode. But there is still a negative LTFT of … portland red line airportWebAug 17, 2024 · This is what I was seeing with the LTFT the couple days before replacing the gas cap. This is stopped, in gear, A/C on. This would be the same even if I cleared the codes, these high negative LTFT numbers would be back within the day. This is 4 days after the new gas cap, same situation...2 pics showing the STFT swing. portland recyclesWebThis can cause hard/no starts as well, but usually results in a rich running condition (fuel trims in the negatives).. but still it's worth checking out. Remove the vacuum hose for the regulator and smell it. If you smell any fuel vapors at all, this is leaking and needs to be replaced.. (likewise if liquid fuel comes out of the hose). optimum pepper moneyWebMar 30, 2024 · LTFT-B2-30.4% The B2 LTFT is always high, unless I nail the throttle, then it drops for only a moment. What does this indicate? At 2000 and 3000 rpms, the reading differences are similar, but lower. STFT-B1- negative 0.7% LTFT-B1-7.8% STFT-B2-0% LTFT-B2-22.6% Air filter is clean, Airflow sensor is clean, O2 Sensors B1-S1 and B1-S2 both give ... optimum performance physical therapy llcWebApr 22, 2015 · This will get you to your desired trim much quicker than trims which have been in place for a while. To do a "hard reset", pull the negative side battery terminal and leave it off for 30 minutes. This will allow all of the residual juice in the PCM to bleed off and cause it to lose its saved memory. portland red claws scheduleWebAug 13, 2024 · Nothing unsual but one thing, high negative LTFT (about minus 20 to minus 30 at idle). The secondary o2 sensor, was stuck at 1.25 volts, so I tought it was that and replaced it, didn't really changed much on the high readings but not it moves and it's not stuck. I replaced also the injectors today, also been told that looked like at least one ... optimum people strongWebAug 26, 2016 · HolyToledo. I replaced every single rubber tube, plugs, ccv, disa, all the usual stuff, and still had high multiplicative fuel trim on inpa at around +10 on both banks. I had fixed all the vacuum leaks, so I started looking more closely at o2 sensors and maf. At idle, short term fuel trim was negative, and on throttle, it went positive, to ... portland refuse collection