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I have an intermittent miss, any suggestions?

Tiny
DALE MOORE
  • MEMBER
  • 1997 GMC SIERRA
Recently had intake gasket replaced, spark plugs have been changed. Now have intermittent engine miss and airbag light is on, also mileage is down about 40 percent. Any suggestions?
Sunday, September 4th, 2011 AT 1:23 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,705 POSTS
Check ignition wires for arcing. Check for vacuum leaks. Also, an easy way to check the wires is this. At night when it's dark, open the hood, start the engine, and mist the plug wires, dist cap. To see if anything is arcing. At night, you can see arcing easier. If you replaced plugs and the wires have been moved around, chances are now there is a arc causing the miss.
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Monday, September 5th, 2011 AT 2:19 AM

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