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Reply To: Rich (negative long term fuel trim) causes

Home Forums Stay Dirty Lounge Service and Repair Questions Answered Here Rich (negative long term fuel trim) causes Reply To: Rich (negative long term fuel trim) causes

#1025319
Taylor Mauldin
Taylor Mauldin
Participant

Have to manually type in. It has a map but no maf.
Engine at warm operating temperature idle 750
Tps 11.4 %
Map 3.9-4.1 psia
Ect 200f
Iat 85f
Oxygen upstream oscillates from .1-.9 back and forth rapidly, upstream short term trim oscillates between 3% rich 1% lean, upstream long term trim -25 % rich, downstream stuck at .115 v sometimes it unsticks and fluctuate between .1-.3 v

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