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Re: 2005 C240 negative fuel trims
Posted to Technical Discussion Forum on 4/20/2017 6 Replies

Read the ethanol factor in the ecm and if between 1.25 and 1.43, reset fuel trim ethanol correction factor adaptations to 1.0

Ck the rubber air filter seal in the housing for leaks

MAF KOEO spec is .99 to 1.03v and idle should rear 4-5g/s

To ck leaky inj... Login to read more.

6 Replies Received (View Replies)