Mechanics

I HAVE A GT 3.1 V-6 THAT IS SHOWING A PO301 READING THAT SAYS A MISFIRE IN CYLINDER # 1.I HAVE REPLACED WIRES,PLUGS,COILS,IGNITION CONTROL MODULE AND EVEN THE FUEL PRESSURE REGULATOR.I HAD A PRESSURE CHECKED DONE ON THE CYLINDERS AND

1998 Pontiac Grand Am • 168,000 miles

After it runs for awhile you can hear the misfire. But when I push down on the pedal it sounds even.
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JimmyE
March 17, 2012.




Your question was cut off.

Check wiring to the #1 plug. Check compression. Make sure the plug is properly seated. Check for vacuum leaks.

Rivermikerat
Mar 17, 2012.


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