1998 Oldsmobile Bravada dead cylinder

Tiny
MICHAEL SHARPE
  • MEMBER
  • 1998 OLDSMOBILE BRAVADA
  • V12
  • AWD
  • AUTOMATIC
  • 213,000 MILES
What to check when 98 bravada has dead cylinder? Pulled spark plug wire off distibtor and does not change sound of motor. The spark plug is firing
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Sunday, September 12th, 2010 AT 3:57 PM

7 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
Verify spark with a spark tester. If you have strong spark, then you probably have a bad injector.

PS, you definitely don't have a V12. You have a 4.3 V6.
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Sunday, September 12th, 2010 AT 4:30 PM
Tiny
MICHAEL SHARPE
  • MEMBER
  • 6 POSTS
Yes 4.3 it is geting spark. How do you replace injector?
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Sunday, September 12th, 2010 AT 4:34 PM
Tiny
WRENCHTECH
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  • 20,757 POSTS
The intake manifold has to come off. You might want to take a compression test before jumping to that conclusion.
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Sunday, September 12th, 2010 AT 4:36 PM
Tiny
MICHAEL SHARPE
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  • 6 POSTS
What should compression be?
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Sunday, September 12th, 2010 AT 5:13 PM
Tiny
WRENCHTECH
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They should mostly be over 150PSI but it would have to be well under 100 to cause a miss.
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Sunday, September 12th, 2010 AT 5:15 PM
Tiny
MICHAEL SHARPE
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  • 6 POSTS
Checked compression it was 40
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Thursday, September 30th, 2010 AT 3:35 PM
Tiny
WRENCHTECH
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Well, that is not good news. Probably a burnt valve or something like that but the heads are going to have to be removed and sent to a machine shop.
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Friday, October 1st, 2010 AT 7:36 AM

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