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Hello, all, I have to make a guess repair and would like some opinions. I have 97 Camry 4 CYL. problem going on for 4 months Once every 2 weeks I will go to start the car when warm and upon startup the idle will drop real low ALMOST to stall. then after 5 or 6 seconds pop up to normal. used to only do this when warm and only at warm startup. Last 2 times though it DID stall had to feed it gas crank twice then it was OK. Now for first time it did this when cold. Dealer said it is probably IAC Valve but will not do anything because they cannot duplicate symptom because it can run perfect for weeks. I am willing to take a chance anf replace the IAC If everyone thinks that is my best FIRST shot atempt.
Please give opinion. Do not want to attempt to clean valve just want to replace it and forget it.
Thanks, B
 

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1990 Celica GTS
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Get throttle body clean. Remove the intake pipe on the Throttle Body. Remove TB if you could. Spray the cleaner into the TB and any hole you can see in the TB. The IAC holes are at the bottom of TB. Spray in there and let it seat for a minute. Remove small rubber hose on the TB ONE AT A TIME and spray into TB through the pipe. Put the hose back before you go to next. This whay you won't mix them up. Spray on the anything that looks black/brown untill they're clean. A tooth brush and some rubbing will help. Spray into the manifold also. Start the engine and spray short blast into TB. Engine will try to stall just spray slowly so it doesn't. Keep spraying into the bottom holes until whole can is gonna. Put everything back and adjust idle and timing. Also remove EFI fuse or battery +ve to reset ECU. I got a few old IAC so don't pay $300 for a new one ;)
 
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