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1995 Oldsmobile Cutlass Misfire issue! Need help!

Tiny
FORDTECH2015
  • MEMBER
  • 1995 OLDSMOBILE CUTLASS
  • 3.1L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 183,000 MILES
Hello, I have a 95 Cutlass Supreme. 3.1. Came in with a misfire that I just can't seem to get rid of. Replaced a lot of parts and still the same issue. Checked for codes and did not find any.
Replaced:
Spark plugs
Wires
All 3 coils
Ignition module
Both crank sensors
Removed converter

I checked for spark even on the new ignition parts, got that. Did a compression test, all passed and are within spec. Performed fuel pressure test, all is good with engine off and key forward and at idle. I have no idea on where to go next. Any help would be appreciated.

Thanks!
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Tuesday, October 6th, 2015 AT 5:07 PM

3 Replies

Tiny
CAR-MAN145
  • MECHANIC
  • 321 POSTS
I have had a lot of problems with dirty fuel injectors you can try a fuel injector cleaning at a shop or just replace the injector
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Wednesday, October 7th, 2015 AT 1:12 AM
Tiny
FORDTECH2015
  • MEMBER
  • 2 POSTS
That was gonna be my next step. The only concern I have is, if I have good fuel pressure can one of the injectors still be bad?

Thanks again!
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Wednesday, October 7th, 2015 AT 5:13 AM
Tiny
CAR-MAN145
  • MECHANIC
  • 321 POSTS
Yes just one can be plugged even if you have good fuel pressure
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Thursday, October 8th, 2015 AT 12:33 AM

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