I have a 1992 RS Camaro that has had the stock engine swapped with a 350 chevy and edelbrock carb and manifold. It has had the issue of running high idle for 20 seconds and stalling a few seconds after it goes to low idle. Things I have done in hopes of finding the issue

- changed fuel filter
- changed spark plugs and plug wires (first start up after, it ran longer but finally died.)
- unplugged and clear fuel lines which did spit gas during crank.
- cleaned and rebuilt carb
- adjusted idle mixture screws (cleared up the white smoke out of tailpipes)
- pulled out ecm fuse once running to cancel out any electronic related problem

Things I have come down to believe the problem could be

- ignition timing
- fuel pressure
- electric choke..? I don't see why it would be.

If anyone has any advice or ideas of what the issue could be, let me know. It's been two weeks and I'd love to get the stalling issue fixed so I can feel confident I'm not wasting my time with the body work.

 

Check your timing, base should be 6-10*,reving it up (it should advance to high 30s) adding the vacuum into it, should add another 10-15*, make sure the advance works.
I'd check carefully for vacuum leaks, plug off the vacuum hoses that are not essential (for testing purposes) & see ifv anything changes.
Sounds like a lean surge, might want to check the fuel pressure, float level, & engine vacuum. Is the egr valve still part of the system?

 

Forgot to mention that I have checked the floats and set them to factory specs, they were way off. If.there is an egr, I can't find it. Any assistance with where to look would be appreciated.

 

On a sbc, the egr would be on the intake right next to the carb, usually on the pass. side.

 

No egr valve. I have found the intake gasket was done pretty horrible. Going to replace it and hopefully that will cure the chances of being a vacuum leak. Not really confident thats the case but worth a shot.

 

dont mean to jack this thread but i need serious help.i have the most unreliable 1992 camaro tbi305 in the world. lol car rus great as long as i dont go more then 10 miles at a time. after that car stalls wont start back up for a few hrs and then it starts up like it never happen till the next 10 miles and so the process begins all over again.was seriously of junking the ecu all together and going to a carb.any suggestions

 

i had a lock up and iac prob for awhile but have since fixed those problems,but takin the car for a road trip would be impoosible with out a tow truck

 

You need to figure out if your loosing spark, injector pulse, or fuel pressure. Sounds like an ignition module, they act up when they get hot.