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305 problem need help

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Old Mar 13, 2003 | 09:31 AM
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305 problem need help

I have an 86 camaro iroc-z with 65k miles on it, it has the 305 HO engine with a 5spd tranny. It is a great car and i love it, but for some reason whenever it gets warmed up it will start cutting out and bucking whenever i give it any gas. This problem has been very persistent and i have had alot of things done to try to fix it. I had new ignition put in, new fuel pump, and carb jetting adjusted. If u might know what the problem is please let me because i am really sick of this problem.
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Old Mar 13, 2003 | 01:51 PM
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Did you replace the fuel filter? What exactly was replaced for this "new ignition"? How was the "carb jetting" adjusted?
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Old Mar 13, 2003 | 04:40 PM
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Demon 357,

I think I know where 5-7 is going with this one. I'll digress to his expertise, but it sounds like a lean mixture issue to me.
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Old Mar 16, 2003 | 08:09 PM
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I just checked with my dad and i had the fuel filter replaced already. I dont really know what my mechanic did to the carburator, but he tweaked with it and said it was working fine. So i really have no idea what is wrong with it.
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Old Mar 17, 2003 | 09:33 AM
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
I would guess it is one of two things: An ignition component that suffers when it gets warm; or a weak fuel pump.
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Old Mar 17, 2003 | 09:44 AM
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From: Oklahoma
I will give you 2 guesses from me. The igntion module.....gets hot starts to lose spark, however this usually causes it to go ahead and die. Or this is a far shot, but it has happened to me twice the distributor has a reluctor under the rotor these are prone to crack with a lot of vibration...Those are my guesses...I would also assume that by new ignition you would have changed the obvious spark plugs and wires.

Kyle
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Old Mar 17, 2003 | 11:47 AM
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hmm, i already replaced the ignition module, fuel pump, and plugs and wires. Is there ne thing else it could be?
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Old Mar 18, 2003 | 12:52 AM
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Distributor cap, rotor, coil.
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Old Mar 18, 2003 | 09:10 PM
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Thanks alot for the tips, ill check it out.
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