High negative ltft
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. WebWhat are some possible reasons why my car would show super negative LTFT in bank 1 and about mid negative LTFT in bank 2? same on stock tune or map 1,2 or 7. Changed out …
High negative ltft
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WebDec 4, 2024 · When descending a hill in a lower gear where the engine is revving a little high as the engine is doing some braking, the LTFT drops to maybe %5. I would think a vacuum leak would produce even higher fuel trim during this condition. Both the MAF and O2 sensors are old. I'll probably just replace them both. WebNov 16, 2024 · If it's negative, the computer believes that you're running a little rich. That could be due to a leaking injector (too much fuel) or air delivery (not enough air). But, I'd …
WebAug 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. WebMar 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 ...
WebJul 30, 2024 · Usually will get between -3% - -7% (depends on how high the LTFT was before). This is when it’s usually the coolest in terms of temperature. On my drive back … WebApr 30, 2024 · 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 …
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.
WebJan 27, 2024 · Negative LTFT was created by Tondt 2002 Ford Escape 3.0 has -20 LTFT and 20 STFT at idle or coasting. More RPM LTFT and STFT go to much smaller numbers but again cancel out. Should I be worried that LTFT and STFT are so high or is it more important that total fuel trim is 0? No DTC, no misfires, no hesitation, no problems. jewish federation of west hartfordWebNov 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 … jewish federation of volusia countyWebFeb 22, 2024 · On the other hand, the negative LTFT value occurs when combustion is richer than the PCM or ECM predicts. Rich combustion is caused by a bad oxygen sensor, leaky … jewish federation of washingtonWebAug 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 ... jewish federation of youngstown ohioWebJan 26, 2024 · If the value is negative, it indicates that the ECU is decreasing the flow of fuel into the injectors because the data it sees shows that the air-fuel mixture is too rich. What … installare minecraft gratis pcWebDec 4, 2013 · A useful diagnostic tool is to determine if the fuel trim problem exists in more than one engine operating range. Fuel trim should be checked at idle, at 1,500 rpm and at … jewish federation of western massWebDec 4, 2013 · If the LTFT for bank 1 is 20% and the LTFT for bank 2 is 3%, the source of the problem is associated with bank 1 cylinders only. The diagnosis should focus on factors related to bank 1. If an engine vacuum leak is suspected, inspect the intake manifold and vacuum hoses for leaks. jewish federation raleigh nc