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Stumbling/bucking in lower rpm acceleration

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Old Dec 3, 2014 | 07:39 PM
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my87_5spgta's Avatar
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Stumbling/bucking in lower rpm acceleration

I have a 87 5speed GTA. Out of nowhere car starts to stumble/bucking at the start of 2nd gear. 1st gear is fine a soon as i go into 2nd it stumbles/bucking hard till i get to a higher rpm and once i start to come back down in rpm to a idle and stop it wants to stall and sometimes does. Any idea what is wrong?
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Old Dec 3, 2014 | 08:19 PM
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1991camaro1996's Avatar
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Car: 1991 camaro
Engine: 305tbi, 350tbi to come
Transmission: t5
Re: Stumbling/bucking in lower rpm acceleration

I would lean towards some sort of ignition issue - cracked/defective dist. cap, bad wires, or spark plugs. If not that, I'd check your fuel pressure.
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Old Dec 3, 2014 | 08:22 PM
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my87_5spgta's Avatar
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Re: Stumbling/bucking in lower rpm acceleration

Originally Posted by 1991camaro1996
I would lean towards some sort of ignition issue - cracked/defective dist. cap, bad wires, or spark plugs. If not that, I'd check your fuel pressure.
Its all new...and fuel pressure is over 30 psi
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Old Dec 3, 2014 | 09:13 PM
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rusty vango's Avatar
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From: knoxville tn
Car: 86 IROC
Engine: 5.0 TPI
Transmission: 700-R-4
Axle/Gears: 2.73 open
Re: Stumbling/bucking in lower rpm acceleration

Originally Posted by my87_5spgta
Its all new...and fuel pressure is over 30 psi
but how much FLOW do you have? flow is as important as pressure
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