surge at idle

[skooterbumm]

i have a 305 tpi with a 204/214 deg .420/.442 lift cam, the heads have 1.94int 1.50 exh, 1.6 roller rockers,shorty headers and dual exhaust, im also useing a jet chip(sorry to admit). I have a surge at idle. Some times when i pull up to a stop light it dies.The minimum air is set at 550 the lowest it will idle, and TPS is at .50 volts.

[WS6 VERT]

If the "MINIMUM AIR" is truley 550 RPM, then it should not stall. What was your procedure to do so?

[skooterbumm]

go to min air set up in any service manual

[james85z28]

what year TPI is your system? When was the last time you changed your oil? How many miles on your engine?

[skooterbumm]

come on guys just because i live in tx doesnt mean im dumb. Its an 86TPI sys. eng has 5000 miles, and i changed the oil 2200 miles ago.I set the min air with a snap on scan tool.

[Michael]

If you have set minimum air and TPS then the only other thing you could try is to clean the IAC.

I have an 86 and had the same problems as you. Looked everywhere for the problem and it was dirty IAC that was the culprit. If you pull it out then you might have to readjust minimum air and TPS again. As when I cleaned mine the car would not start and re-adjusted min air and all was cool.

[Pantera61]

I would agree, I think that since you have set everything else. Cleaning the IAC should work. Post back and let us know how it is going.

[skooterbumm]

I cleaned the IAC again, still surges. It gets worse as it gets warmer.Is the IAC bad? I didnt mean to offend anyone, but its like asking if you change the air in your tires!

[ June 27, 2002, 00:40: Message edited by: skooterbumm ]