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1998 f-150 with a 5.4 replaced vacuum line elbow and 2 days later check eng light with rough idling you think you found the new leaking line cannot trace after hit fire wall need vacuum routing guide?
Larueski
the vacuum line runs to the back of the engine and fits inside a little rubber thing that is best described as a "tit" with a hole in the center. it's behind the egr valve underneath. push the hose into that tit and use a zip tie to secure it. reset the p0402 code and your done. the code may reset itself after driving a short time
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