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International Automotive Technicians Network
Re: FUEL TRIM LEAN DIAGNOSIS
Posted to Technical Theory Forum on 6/28/2025

For years I have often wished for an injector on-time data base. If the fuel trims are positive, but the injector on-time is correct, then we have a failed sensor somewhere.

If the fuel trims are positive, and injector on-time is increased, then fuel supply ... Login to read more.