THIS HAPPENS ONCE OR TWICE A YEAR WHEN REALLY ...

2003 GMC Envoy

Tiny

Anonymous

December, 27, 2012 AT 11:12 PM

This happens once or twice a year when really cold. It starts good but when I accelerate it makes a pinging sound then slows down to no more than 10-15 MPH. If I pull over & floor the gas pedal it will not rev up. After I turn keyoff for a minute it takes off just fine

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