same problem
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Junior Member
Joined: Nov 2003
Posts: 87
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From: michigan
Car: 92 rs
Engine: 305tbi
Transmission: 4l60e
same problem
i did that a while ago i put it 93 octane and the car ran like **** then i checked my spark plugs and they were all black every since then my car ran like crap still trying to fix the problem im not excatly sure if the gas caused it but i couldnt get it started for a while either
Member
Joined: Sep 1999
Posts: 154
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From: Gardendale, AL., USA
Car: '89 Formula
Engine: 305 TBI
Transmission: Auto
I think I've tracked mine down to the EGR and the circuits involved with it.
If memory serves me, I think black fouled plugs indicate a rich condition.....
....have you checked codes?
It has been my experience(and trust me, I'm new at this....old muscle MOPAR guy normally
) there are a world of things that can be the problem.
My best friend in '80's GM is a little piece of metal with 2 prongs.
It usually tells me more than I want to know!LOL
If memory serves me, I think black fouled plugs indicate a rich condition.....
....have you checked codes?
It has been my experience(and trust me, I'm new at this....old muscle MOPAR guy normally
) there are a world of things that can be the problem.My best friend in '80's GM is a little piece of metal with 2 prongs.
It usually tells me more than I want to know!LOL
Supreme Member
Joined: Mar 2001
Posts: 6,577
Likes: 0
From: Portland, OR www.cascadecrew.org
Car: 1990 Camaro RS
Engine: Juiced 5.0 TBI - 300rwhp
Transmission: T5
Axle/Gears: 3.42 Eaton Posi, 10 Bolt
you also have a timing problem right? i would fix the timing, get new plugs, then see where you are at.
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