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-   -   Rough idle after warmed up, dies, bad smell (https://www.thirdgen.org/forums/tech-general-engine/758383-rough-idle-after-warmed.html)

Sean's Garage 01-09-2019 12:56 PM
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 🙂

Tuned Performance 01-09-2019 01:03 PM
Re: Rough idle after warmed up, dies, bad smell
 
The smell could be a plugged catalytic converter.

Sean's Garage 01-09-2019 01:14 PM
Re: Rough idle after warmed up, dies, bad smell
 
Originally Posted by Tuned Performance (Post 6273389)
The smell could be a plugged catalytic converter.
The cats are cut off

Tuned Performance 01-09-2019 01:18 PM
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.

henryd3 01-09-2019 01:34 PM
Re: Rough idle after warmed up, dies, bad smell
 
Have you done this?
https://www.thirdgen.org/tpimod2/

Sean's Garage 01-09-2019 10:20 PM
Re: Rough idle after warmed up, dies, bad smell
 
Originally Posted by Tuned Performance (Post 6273396)
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.
No check engine light, yes only when warm, probably old, and I haven’t checked them but they spray in a good cone shape

Sean's Garage 01-09-2019 10:22 PM
Re: Rough idle after warmed up, dies, bad smell
 
Originally Posted by henryd3 (Post 6273398)
I haven’t done that, basically just torqued it to spec and plugged it in, never changed one before and I bought it from a smaller part shop and it just came in a plain white box with no instructions. Is this what happens when you don’t adjust it?

Aaron R. 01-22-2019 07:37 AM
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.

shredthegnar 01-24-2019 01:49 PM
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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