Shaking
#1
Shaking
i am having trouble with getting my 78 F250 with a 400 to idol smooth. it idols rough and shakes the hole truck. it goes away at around 1100 rpm. I changed the plugs. Found a vacuum leak around the manifold. replaced valley pan with just regular intake gaskets. Couldn't find anymore leaks. Not sure were to go next. I could use some ideas and help. Thank you.
#2
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