Help, tune up didn't solve problem
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Senior Member
Joined: Feb 2001
Posts: 675
Likes: 4
From: kentucky
Help, tune up didn't solve problem
I've been helping out my brother to get his recently purchased 91 firebird on the road. He purchased it with a bad hesitation problem thinking we could fix that with a good tune up. Especially after pulling and seeing one plug! This past weekend we installed plugs, cap and rotor, pcv valve (all removed were pitiful shape) We also changed air filter and oil and oilfilter while into it.Well, the result was a major improvement in acceleration, but the hesitation is still there . Especially at low rpms and shiftdowns(AOD). Also I noticed a little bit of black smoke from the pipes when he nailed it. Inspection of all plugs showed all three on pass. side good ,but all three on drivers side black with soot. Now he says the bird just stalls on him every few miles stopped or going. What other type of things should we look for? Do we need to check sensors or codes or something? If so, which ones? any and all replys appreciated, Thanks
Member
Joined: Mar 2001
Posts: 384
Likes: 0
From: Union City, CA
good place to start is the MAF sensor. Are there any trouble codes? Also is it an auto or manual? A little black smoke out back when he's on the gas is typically normal. Let me know whats goin on! payce.
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85 2.8L Sport Coupe 5-speed.
Mods: Hpertech chip and powerstat, MSD 6A-L, Crane fireball coil, Dynomax hi-flow cat and catback system with a dynomax magnum race bullet muffler on the i-pipe, K&N filterchargers, Eibach and Tokiko springs/shocks setup, Global west sub frames, Suspension techniqs front and rear sway bars, and good ole 88 IROC wheels with Kumo Ecstas on em!
"I'm out to seek those pesky VTEC boys!" (don't get me wrong, I'm asian myself! hehe)
Wins: 2000 V6 Accord, 69 302 Mustang, 2000 Auto VR6 Jetta, 89 Toyota MR2, 90 Civic Si, 76 350 Camaro.
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85 2.8L Sport Coupe 5-speed.
Mods: Hpertech chip and powerstat, MSD 6A-L, Crane fireball coil, Dynomax hi-flow cat and catback system with a dynomax magnum race bullet muffler on the i-pipe, K&N filterchargers, Eibach and Tokiko springs/shocks setup, Global west sub frames, Suspension techniqs front and rear sway bars, and good ole 88 IROC wheels with Kumo Ecstas on em!
"I'm out to seek those pesky VTEC boys!" (don't get me wrong, I'm asian myself! hehe)
Wins: 2000 V6 Accord, 69 302 Mustang, 2000 Auto VR6 Jetta, 89 Toyota MR2, 90 Civic Si, 76 350 Camaro.
Supreme Member
Joined: Mar 2000
Posts: 13,414
Likes: 6
From: Central NJ, USA
Car: 1986 Firebird
Engine: 2.8 V6
Transmission: 700R4
Looks like you left off the fuel filter, but that wouldn't cause 1/2 the plugs to be fouled. What about the spark plug wires? How's the timing?
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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!
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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!
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