unable to manually pull any codes

1994 PONTIAC TRANS AM
60,000 MILES • 5.7L • V8 • RWD • AUTOMATIC
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MAXMIT
  • MEMBER
  • 1 POST
12 pin connector
jumper wire from a to b terminal
turn ign. key on and the cooling fans kick on, and the check engine light does not flash

the car will start and run, but runs rough like the firing order is off or something similiar
Sep 19, 2014 at 1:47 PM
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WRENCHTECH
  • ✓Experienced Mechanic
  • 20,760 POSTS
Your car is OBD1 so the codes won't be much help anyway because they didn't even track misfires back then. If you have a misfire, you're going to have to find it the old way by testing for RPM drop of each cylinder when it's disabled.
Sep 19, 2014 at 10:34 PM
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