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Re: what is causing this peculiar fuel trim at idle?
Posted to Technical Discussion Forum on 4/14/2014 6 Replies

Testing has already provided the answer: -15 fuel trim indicates the computer is subtracting fuel. A dripping injector is 3 x richer at idle than at 1800 RPM. At low speed it has more time to leak between firing. A scope pattern will identify which injector b... Login to read more.

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