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Re: 2000 Chevy Astro testing EGR valve power (12v) circuit
Incidentally, while a leaking EGR can contribute to a rought idle and misfire in the lower RPM ranges, it is very common to generate that P0300 (Multiple/Random Misfire) due to an ingtition coil secondary problem, such as breakdown of the distributor cap and rotor, or failing ignition coil.
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