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Car will idol but once foot off gas it dies

(1999 Pontiac Grand Am)
in Wailuku, HI on November 28, 2010
car will start but once i stop pressing gas it dies...making a knocking sound also...
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Popular Answer
on November 28, 2010
Really need to go through the basic checks i.e check for codes, check fuel pressure, check coil out put. Not sure about the knocking sound, is the oil and coolant at their proper level? Did the engine ever overheat?
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on January 08, 2011
check and see if the sound is comming from the front by thy pullys if so then it is another typical case of GM's failed timming tensionors and you will need a compleete timming set or it could just be a failed coil and fouled plugs
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