Anybody ever heard of fuel trims running opposite of each other and almost fixed. Mainly under 2k rpm. -20.31 +31.81. seems to do it more when cold, could it be bad o2 sensors especially with o2 sensor heaters. Unsure what it could be besides that. Reading funny and throwing the engine out of wack. Also possibly a clog in the fuel injectors, with large amounts of throttle it seems to go pass it and runs good but as soon as you let off it run poor again.
Opposite fuel trims
- Thread starter Doriken
- Start date
Remove the fuel injectors and either, clean and rebuild them or send them out to be cleaned, rebuilt, and flow tested.
Copy/Pasted from another thread for reference.
[Lots] of dudes on here are tuned to the bleeding edge.
[Lots] of dudes on here have mystery air/fuel ratios or blown head gaskets for one cylinder or erratic behaviors at full or part power settings.
I for one, would [not] fin a warm fuzzy from a 14% variance between injectors in a brand new injector set.
Keep in mind that the stock EEC can vary a "bank" of injectors as much as 20% and [not] individual injectors. So, to me... 14% is a [lot].
[Lots] of dudes on here are tuned to the bleeding edge.
[Lots] of dudes on here have mystery air/fuel ratios or blown head gaskets for one cylinder or erratic behaviors at full or part power settings.
I for one, would [not] fin a warm fuzzy from a 14% variance between injectors in a brand new injector set.
Keep in mind that the stock EEC can vary a "bank" of injectors as much as 20% and [not] individual injectors. So, to me... 14% is a [lot].
thank you! Just was trying to avoid it and see if there was any possibilities than came to mind!Remove the fuel injectors and either, clean and rebuild them or send them out to be cleaned, rebuilt, and flow tested.
Copy/Pasted from another thread for reference.
[Lots] of dudes on here are tuned to the bleeding edge.
[Lots] of dudes on here have mystery air/fuel ratios or blown head gaskets for one cylinder or erratic behaviors at full or part power settings.
I for one, would [not] fin a warm fuzzy from a 14% variance between injectors in a brand new injector set.
Keep in mind that the stock EEC can vary a "bank" of injectors as much as 20% and [not] individual injectors. So, to me... 14% is a [lot].
It's something you can do yourself if you think you might have issues outside of the injectors:
View: https://www.youtube.com/watch?v=mU1u9nmydjM
If the injectors are really bad, I would suspect the came conditions throughout the rest of the fuel system.
Are you sure the injector harness isn’t swapped?
Disconnect what you think is bank 1 sensor 1 and see if the o2 PID for it goes dead
Disconnect what you think is bank 1 sensor 1 and see if the o2 PID for it goes dead
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