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Re: 2004 Yukon Denali EVAP.What Code is This?
Posted to Technical Discussion Forum on 9/2/2007 17 Replies

Hi Jim,

[...trimmed text...]

Here is a shot with fuel trim cell PID. This also shows how rapidly short and long term fuel trims dropped, about 15 seconds to reach -25% and -17% from 0%. Note how perfect the bumps are, ... Login to read more.

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