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Engine missing

Tiny
RONALD FRANKLIN
  • MEMBER
  • 1999 OLDSMOBILE 88
  • 3.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 114,000 MILES
I am back again. Sorry. Well I did a major tune-up including all three coils about eight months ago. I replaced also I think it is called the EGR. Today I replaced the air filter, MAS, both o2 exhaust sensors. Still getting the random misfire code. It runs very rich. Could it be a bad injector? Any help would be greatly appreciated. Thanks
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Monday, September 4th, 2017 AT 5:31 PM

1 Reply

Tiny
HARRY P
  • MECHANIC
  • 2,293 POSTS
What spark plugs and wires did you use? These cars have a fairly strong spark coming out of the coil that seems to wear out off-brand plugs and wires quickly. OEM stuff does pretty well. Everything else I have tried in them starts to fail within about six months.
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Monday, September 4th, 2017 AT 7:40 PM

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