Long Term Fuel Trim High At Idle — Porsche Taycan Outdoor Car Cover
The MAF, do you suspect it is a cheap copy or something? And neither did the PIDs. Total fuel trim is an additive value: STFT+LTFT=Total Fuel Trim. I am assuming that is not the case and idle is normal. STFT is now +14% with AC on. You must be logged in to reply to this topic. This thing with the air conditioner is so confusing to me, because it's got to be something to do with air flow, right?? Crazy high fuel trims after fixing vac leak?? Make sense of Long term fuel trim. Make sense of Long term fuel trim... Then I reapply the exact same tune with negative fuel trim values set to 0 and the car wants to swing back and forth between 12-15AFR?
- High positive fuel trim at idle
- What does high long term fuel trim mean
- Long term fuel trim high at idle speed
- Long term fuel trim high at idle light
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High Positive Fuel Trim At Idle
Tried spraying carb cleaner at all the pipework and gaskets you can just as a secondary test? The exhaust is now not leaking, but the LTFT remains at 25%. Must admit, I hate multi-pronged plugs! And when did it last run correctly? Distributor cap and rotor.
What Does High Long Term Fuel Trim Mean
This seems to go up in line with the intake air temperature. God that was a long post, hope it helps.... PS the hot side of the turbo is the Exhaust side. I have tried to find this leak by trying: applying propane from the throttle body on downstream. If open loop you should get a good view at the raw voltages which will be of more use. Using total fuel trim and fuel spread can point you in the proper direction for a successful repair that will restore the vehicle's drivability and its emission controls. Negative fuel trim values. Under boost it will be closed so that all the pressure is going to your engine not (bypassed back into the intake) The moment you lift off the gas it momentarily opens, pssshhh, and that extra pressure is fed through the hose that goes to your intake hose (inducer side). Air filter (OEM Toyota). Long term fuel trim high at idle speed. But both the STFT and LTFT returned to almost normal values when driving and accelerating, just as the customer had described.
Long Term Fuel Trim High At Idle Speed
Long Term Fuel Trim High At Idle Light
Up until recently when this was happening, the fuel trim values stayed at stock values: -31. THANK YOU and a big happy 4th of July! Also - the scan tool shows vacuum at 20. 7:1) during closed-loop operation. High positive fuel trim at idle. This suggests to me that there is a sensor fault rather than a mechanical issue as then while being driven over the next few hours reverts back to the poor running condition and high adaption values. The odometer shows 140, 000 miles have slid by under the vehicle. These engines are sensitive to un-metered air, loose oil filler caps and even a dip stick that isn't installed properly or has a torn O-ring is enough to cause a fuel trim and MAF codes on these engines, but my visual inspection had turned up nothing. Some people have suggested resetting the fuel trims by doing a throttle re-learn (? ) 0 tsfi, ltft at IDLE=13. Will be interesting to see.
Suspicious of an intake leak, I installed my smoke machine, but the intake was not the issue, neither was the brake booster or the hose. If the number is at 0, then there is no change. Fuel trim for diagnostics | Vehicle Service Pros. I am waiting on the delivery of a pressure gauge so I can check the accuracy of the MAP sensor in more detail. Hopefully it's just the intercooler chipping away from rocks? What exactly was blocked off? Thoughts to try and see if you get different results. Then if you want we can work on disabling the S02 in a different way but this will fix your problem.
I don't know a ton about cars but I can Google and read. I did run the old AFM without the bung for a long time though. I recently worked on a 2002 Crown Victoria that would start but wouldn't stay running due to a contaminated MAF sensor. This value also varies depending on engine type. Spark plugs and coils are all new.
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