1998 Gmc C1500 Runs Bad Rains Out Did Total Tuneup Including Cap Rotor Still

1998 GMC C1500
150,000 MILES
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Runs bad when it rains out, did total tuneup including cap and rotor, still bad only when its damp or rains out
Apr 1, 2013 at 4:03 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
Try this. When it is dark out, open the hood, start the engine, and mist water on the ignition system to see if there are any shorts. Make sure to wear old clothes and protect your eyes.
Apr 1, 2013 at 7:28 PM
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