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Engine Misfire on #3 cylinder!

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dsm023

15+ Year Contributor
69
3
Mar 3, 2004
Orlando, Florida
Anyone ever have this problem? Started about 4 weeks ago as a slow stutter I notice when the car was boosting. Boost gauge would bounce back and forth around 16 psi and engine had a hestiating sound.

2 weeks ago as I was cruising at 55 mph the car starts to make a bogging down noise and stalls! The car idles perfectly when sitting still. The problem comes and goes and seems to show up when driven. Took it into the dealership today and it was a 303 code... #3 cylinder misfiring. My mechanic is somewhat puzzled. Compression test was done and @ 150! I've changed out the coil pack, wires, and plugs(gapped @ .028) and the computer at the dealership wasn't throwing anymore codes!

TIA!
 
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