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1996 Oldsmobile Aurora Random Misfire trouble code.

Tiny
IAMWILLEY83
  • MEMBER
  • 1996 OLDSMOBILE AURORA
  • V8
  • FWD
  • AUTOMATIC
  • 224,000 MILES
My aurora has a trouble code of random misfire and has excessive gas consumption. The idle is rough and the after I run it for awhile and let it sit it will take about 5 seconds or more to start. Any Ideas on what the problem may be?
Tuesday, January 19th, 2010 AT 9:14 PM

1 Reply

Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
Hello iamwilley83,
Welcome to 2carpros. Com

Dead oxygen sensor could cause rich condition in all cylinders. Or coolant sensor that prevents the computer from going into closed loop, or by a faulty fuel pressure regulator that feeds too much pressure to the injectors.
Check the intake vacuum to see if there is an air leak that's upsetting the overall air/fuel mixture. A couple of overlooked causes here may be a leaky EGR valve or a leaky power brake booster.
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Tuesday, January 19th, 2010 AT 11:11 PM

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