I am still trying to narrow down this intermittent idle situation (occurs about 30% of the time). Car shakes like a gasser at low idle with an agressive cam… I can see the hood and dash jumping, other times it is as smooth as silk. :puzzled:

Can the EGR valve have anything to do with it?

Thanks,
John

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1986 190D, 2.5L, 5-speed swap, 180,000 Miles (60K by me).
Jeep CJ-7 with Cummins 4BT/NV4500/AtlastII 4.3.
Grand Wagoneer 4BT project in progress!