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What cause Rich fuel trim at wot?
Posted to Technical Discussion Forum on 1/17/2013 20 Replies

Hi tech's just wanna know What cause negative fuel trim at wot? i know some reasons just tell me if i am wrong ok.

1)bad 02 sensor-just heard 02 internal leaks cause this

2)stuck open egr valve

3)ruptured fuel pressure regulator

4)stuck open injector

5)retard timing-can anyone explain how this leads to Rich fuel trim at wot

any other reasons and explanations are welcome here->

Deen Jhons
Educator/Instructor
Deen Motors
Kandy Matale, Sri Lanka

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