Misfire

1996 GMC C1500
150,000 MILES • V8 • 2WD • AUTOMATIC
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MIKKLO
  • MEMBER
  • 1 POST
My 96 gmc sierra has a cylinder 5 misfire and Ive changed the spark plugs and cables and rotor and distributor cap and injector and it still is acting up. what could it be?
Jan 25, 2011 at 1:19 PM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good afternoon,

I would start by checking the compression to be sure the cylinder is good.

https://www.2carpros.com/articles/how-to-test-engine-compression

You need 140-160 pounds of compression. You can rent a tester at a parts store.

Roy
Jul 26, 2021 at 7:41 AM
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