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Mysterious EGR intermittent on a Ford...theories anyone?
Posted to Technical Discussion Forum on 12/17/1999 2 Replies

hada 1991 Ford F150 with 4.9 liter inline six, concern was hesitates and runs rough going down the road.

Immediately I suspected the EGR.

first off the bat, hooked in a vacuum gauge in place of the EGR, it showed vacuum instantly off Idle. (in shop, no loa... Login to read more.

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