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 🙂

The smell could be a plugged catalytic converter.

The cats are cut off

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

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?