Pontiac Grand Prix Problem Report
Pontiac Grand Prix Rough and/or High Idle Due to Engine Vacuum Leak
The upper intake manifold gasket and/or a PCV vacuum lines/hoses can develop vacuum leaks with age. This type of leak can result in a higher that normal or rough idle.
Where are the vacuum lines located
where is the pcv located? is not where the vacuum hose routing diagram shows
when you start the engine it idles fine for 2 to 3 seconds then shuts off. if you rev the engin...
The intake manifold gasket may develop and external engine oil or coolant leak. In some cases,...
The high pressure power steering hose will commonly leak fluid; it should be replaced.