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What would cause my 1988 Comanche 4.0 to idle OK but misfire terribly upon acceleration?
Wiki User
∙ 9y ago
Answer it could be that the vacuum advance on the distributor is not working. You need a timing light to be able to tell, but when the accelerator is pushed down, this causes the engine vacuum to increase, which should automatically advance the ignition timing. If the hose has come loose, or has a hole in it, the distributor will not advance. The vacuum advance itself also might be bad.
A bad spark plug(s) or spark plug wire(s) could also cause those symptoms.
Wiki User
∙ 9y ago
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