Quote:
Originally Posted by marvind
Took my car to have it detailed and specifically told them not to pressure wash the engine, they did anyways. Now it has a misfire in it under power, at idle its fine. The miss isn't constant its intermittent. Any ideas on where to start? Its a 91, and there are no check engine lights on.
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Pressure washing the engine in addition to flooding the starter may alter the Electrical Connectors and/or upset vacuum line connectors. Let the engine just sit for a day or two to dry out (or run it as engine heat will dry it out faster). The MAPS connections for example could have been disconnected by the water pressure.
Inspect each spark plug hole for moisture as
mike100 suggests. Leave the plug boots out of the holes for a few hours to dry out just in case.