305 TPI Idles very rough and bogs under acceleration
05-18-2013, 05:42 PM
#1
305 TPI Idles very rough and bogs under acceleration
I'm new to this forum but have used it for help many times before, I just bought a 86 Trans Am 305 TPI, It idles very rough but no matter how low the idle drops it doesn't stall and when I go to rev it bogs down and wants to stall. Sometimes if I feather the gas or mash the throttle I can get it up. I pulled it in my garage right after the tow truck dropped it off so I haven't had a chance to really drive it and see if it wants to bog in gear. I cleaned the maf sensor and also unplugged it and started it up but it ran worse. I know I should replace the filter, tps sensor, and iac valve but money's kind of tight right now. If someone could give me possible causes of this it'd be greatly appreciated, thanks
05-18-2013, 11:00 PM
#2
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Car: 1988 gta, 1986 trans an
Engine: 305 tpi, 305 tpi
Transmission: 5 speed, auto
Axle/Gears: 3.45, 2.77
Re: 305 TPI Idles very rough and bogs under acceleration
i have been having a similar issue also and i cant figure it out..
05-19-2013, 10:16 AM
#3
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Car: 91' Firebird SOLD
Engine: 350 TPI +bolt-ons
Transmission: 700r4
Axle/Gears: 3:42
Re: 305 TPI Idles very rough and bogs under acceleration
Scan for trouble codes, Test your fuel injectors for ohms. Then go from there.
05-22-2013, 04:08 PM
#5
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Car: '91 Camaro RS
Engine: Carb'd 383
Transmission: Built T5
Axle/Gears: 3.73 Posi
Re: 305 TPI Idles very rough and bogs under acceleration
Check O2 sensor, if its bad it could be telling you to run rich/lean
05-22-2013, 05:00 PM
#6
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Car: 1990 IROC-Z/1980 Firebird
Engine: 5.7 TPI
Transmission: 700R4
Axle/Gears: 3.27
Re: 305 TPI Idles very rough and bogs under acceleration
Could be a misfire? Or a bad egr that's sticking open? It's easier to feel a misfire though, so that can be easily ruled out if you know what to look for. Any progress?
05-22-2013, 05:47 PM
#7
Re: 305 TPI Idles very rough and bogs under acceleration
It's not misfiring, my dad is rushing me to get the body ready for primer by Saturday so he can use the garage for a side job. I haven't had the time to start the mechanical work yet but I'll write back hopefully next week when I can replace the o2 sensor
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05-23-2013, 09:17 AM
#9
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Car: 91' Firebird SOLD
Engine: 350 TPI +bolt-ons
Transmission: 700r4
Axle/Gears: 3:42
Re: 305 TPI Idles very rough and bogs under acceleration
Could be anything. Check for codes, Ohm your injectors, clean your IAC,etc.
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