Johnny Dishman
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- Oct 16, 2010
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...low speed have checked sencors? also changed distributor new plugs and wires new cap and rotor button.took it to a dealer and they kept it 17 days and they cleaned fuel pump and changed fuel regulator and egr valve only things i haven't checked or replaced is the knock sensors.have changed map sensor and coil.from idle to half throttle it backfires but if you punch it to the floor it starts spinning and runs strong.so is there anything else other than the knock sensors that could be causing the problem?by the way it was ed rogers chevy dealer in sparta tennessee that charged me almost 500 bucks and it still runs very bad.