car missfires at high speed what is causing missfire ?
Mar 6, 2010 at 11:35 AM
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LEGITIMATE007
CERTIFIED EXPERT
5,121 POSTS
misfires are caused by several things, intake manifold gasket is one, egr valve that is dirty,stuck ,or faulty is another, a clogged catalytic convertor is one, intake restrictions,like a dirty air filter, plugs and wires,