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- Mon Apr 06, 2015 3:36 pm
- Forum: Technical Conversations on Pontiac Fieros
- Topic: poor running fiero
- Replies: 4
- Views: 2694
poor running fiero
HI everyone, I'm new here but not new to cars. I have a problem with my stock 86 2.8 fiero gt. This car has never seen a winter and still has its original exhaust. To get right to the point, cylinders 2,4,6 plugs are black and it blows black out the tailpipes. Plugs 1,3,5 are perfect, light brown no...