Rough idle after warmed up, dies, bad smell
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Joined: Jul 2018
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Rough idle after warmed up, dies, bad smell
So I have a 92 camaro rs 305 tbi auto, bought it a couple months ago and the guy said it dies beause it needs an iac valve. I replaced it and the problem was the same. It’ll fire right up, idles bad, when put into reverse or drive it dies unless given gas, when I gas it, it smells bad like maybe rotten eggs. Any help is greatly appreciated.
New parts:
distributor rotor and cap
Iac valve
egr valve
map sensor
coolant temp sensor (by thermostat)
fuel pump
fuel filter
fuel pump strainer
intake air temp sensor
alternator
thanks 🙂
New parts:
distributor rotor and cap
Iac valve
egr valve
map sensor
coolant temp sensor (by thermostat)
fuel pump
fuel filter
fuel pump strainer
intake air temp sensor
alternator
thanks 🙂
Joined: Dec 2004
Posts: 16,736
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Rough idle after warmed up, dies, bad smell
The smell could be a plugged catalytic converter.
Joined: Dec 2004
Posts: 16,736
Likes: 993
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: Rough idle after warmed up, dies, bad smell
Check engine light on ?
Does this happen only when the engine is warmed up ?
how old is the o2 sensor ?
have you checked for leaking injectors ?
you can check the spray pattern with a timing light.
Does this happen only when the engine is warmed up ?
how old is the o2 sensor ?
have you checked for leaking injectors ?
you can check the spray pattern with a timing light.
Joined: Aug 2009
Posts: 1,821
Likes: 40
From: Central California
Car: 92 Camaro RS
Engine: LO3
Transmission: T5
Axle/Gears: stock
Re: Rough idle after warmed up, dies, bad smell
Have you done this?
https://www.thirdgen.org/tpimod2/
https://www.thirdgen.org/tpimod2/
Thread Starter
Junior Member
Joined: Jul 2018
Posts: 14
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Re: Rough idle after warmed up, dies, bad smell
No check engine light, yes only when warm, probably old, and I haven’t checked them but they spray in a good cone shape
Thread Starter
Junior Member
Joined: Jul 2018
Posts: 14
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Re: Rough idle after warmed up, dies, bad smell
Have you done this?
https://www.thirdgen.org/tpimod2/
https://www.thirdgen.org/tpimod2/
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Supreme Member
Joined: Oct 2004
Posts: 1,055
Likes: 309
From: Missouri
Car: 1985 Z28
Engine: 305 LG4
Transmission: T5
Axle/Gears: 3.42
Re: Rough idle after warmed up, dies, bad smell
I'm not familiar with the TBI setup, but I had an improperly adjusted TPS do exactly this on a TPI engine. It smelled bad at idle too. When I installed it had inadvertently set it to .054 volts, instead of the correct setting of .54 volts.
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Re: Rough idle after warmed up, dies, bad smell
My 92 RS was doing the same thing. I replaced the iac and throttle position sensor, then reset the ecm. It seems to have helped a lot, but sometimes when I start it after the car has already got up to temp it will stall like it is vapor locked, I think its because the charcoal filter is clogged.
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Joined: Jul 2018
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Re: Rough idle after warmed up, dies, bad smell
This reply is 5 years late, I've since graduated high school and tech school haha. Anyways, shredthegnar solved it. It was the IAC valve causing it to run lean once the ECM entered closed-loop. This lean condition caused that nasty smell and caused it to stall. Hope this helps anyone else having issues with their TBI. If it stalls at idle when hot, the first thing I would check is the IAC.
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FreeSpirit
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Jun 13, 2013 04:44 AM