1998 Oldsmobile Bravada dead cylinder

1998 OLDSMOBILE BRAVADA
213,000 MILES • V12 • AWD • AUTOMATIC
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MICHAEL SHARPE
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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
Sep 12, 2010 at 3:57 PM
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WRENCHTECH
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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.
Sep 12, 2010 at 4:30 PM
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MICHAEL SHARPE
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yes 4.3 it is geting spark. how do you replace injector?
Sep 12, 2010 at 4:34 PM
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WRENCHTECH
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The intake manifold has to come off. You might want to take a compression test before jumping to that conclusion.
Sep 12, 2010 at 4:36 PM
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MICHAEL SHARPE
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what should compression be?
Sep 12, 2010 at 5:13 PM
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WRENCHTECH
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They should mostly be over 150PSI but it would have to be well under 100 to cause a miss.
Sep 12, 2010 at 5:15 PM
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MICHAEL SHARPE
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checked compression it was 40
Sep 30, 2010 at 3:35 PM
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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.
Oct 1, 2010 at 7:36 AM