Code P0303

2002 VOLKSWAGEN JETTA
115,000 MILES • 2.0L • 4 CYL • 2WD • AUTOMATIC
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COOKIN_WITHFIRE
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  • 1 POST
Cylinder three misfire that is bad when cold and only in 1,200 to 1,800 rpm range when warm. I have gone through: plugs, wires, coil pack, intake leaks, injector, compression, TSB on ground to the coil pack harness, still no progress.
Feb 20, 2019 at 9:39 AM
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SCGRANTURISMO
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  • 4,897 POSTS
Hello,

This could be an intermintant injector problem or wiring harness problem. I have included a link for you to go to. Go through the guide and let us know what you find out. I have also included a wiring diagram with the injector circuits on it for your reference. Let us know what you find out.

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Thanks,
Alex
2CarPros
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Feb 20, 2019 at 11:26 AM