Car running rough

Asked by GuruL9L67 Mar 19, 2019 at 08:43 PM about the 1989 Chevrolet S-10 RWD

Question type: Maintenance & Repair

Why does my car start running rough when I slow
down and if I pull the pcv line off and let the engine
rev up it starts to work again has a new PCV valve

1 Answer
130

GuruZCZH answered 4 years ago

Try checking your intake manifold gasket. Often they leak and would cause your problem. You may not feel it much when engine is running at high rpm but would become more apparent as you slow down. Good luck.

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