Help me figure out why i am running leaner without adjusting my map or f/pressure
#1
Help me figure out why i am running leaner without adjusting my map or f/pressure
This one has got me stomped. I am one point leaner in AFR during idle and boost. But get this,I have not messed with anything.I have two widebands, an LC1 tied into my ecu for logging, and another seperate unit for display. They both register 1 to 1.5 ponts leaner than usual.
What could be the cause.
Things I have checked:
Base fuel pressure
Fuel pressure under boost
Fuel pump setup
Fuel pump
Voltage
Thanks for your suggestions
What could be the cause.
Things I have checked:
Base fuel pressure
Fuel pressure under boost
Fuel pump setup
Fuel pump
Voltage
Thanks for your suggestions
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air/water temp correction maps if any, if not then what he said ^
Wouldn't be a fuel pump/filter issue if he's getting proper pressure under boost. Do you log fuel pressure, or just a mechanical gauge?
Wouldn't be a fuel pump/filter issue if he's getting proper pressure under boost. Do you log fuel pressure, or just a mechanical gauge?
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#8
Thats right, EMS Stinger. The air correction was set and has been working reasonably well up to now. Its just recently I noticed that I was idling at 13xxafr and I normaly idle at 12xx. I didnt pay much attention to it and went a step further and do a logged pull. Sure enough my afr accross the rpm range were about 1 to 1.5 afr leaner. It was the strongest pull I have I have felt at that boost level, and even stopped early because I thought I was over boosting. I dont think my LC1 needs to be recallibrated, it is reading right the car is deffinitely leaner and stronger. My next step will be to increase my fuel trim percentage accross the entire map and I am pretty sure that will solve the prob. I just want peace of mind by knowing what caused the sudden change of afrs
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