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Old 08-06-2018, 12:18 AM
Craig Faria Craig Faria is offline
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Join Date: May 2017
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Default Fuel trims

Hey guys been doing some poking around in the internet and had a question that I havenít been able to get answered. Got a truck with p0420 and p0430 codes. Was trying to diagnose truck using the fuel trims and noticed one thing. Both short term fuel trim 1 & 2 stay the same for the most part after letting vehicle idle for a while and watching the trims I have seen 1 get above 10. But the long term fuel trims are different. 1 is at 5.5 and 2 is at 7. I know that the short trims are supposed to be similar but what about the long term trims ?

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Old 08-06-2018, 11:28 PM
Undrstm8ed Undrstm8ed is offline
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Default Re: Fuel trims

Maybe find some information here in this .PDF

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