6G Celicas Forums

Car starts fine and runs fine on cold starts. On hot starts, like after running into a gas station, car is a pain to get started and once started idles at 1800-2000 rpm. I already pulled the iacv and cleaned it (it also spec'd out within range @20.6 ohms) the other day, should I just replace it? Or is there some other reason my car would be idling this high?

I suppose I should note that I've had the car for the last 25k miles and just replaced the spark plugs/wires about a month ago. Didn't have problems before last week. I'm at a loss here if a new iacv won't fix my issue.

do you still have the old parts? try putting them back in and see if it fixes the problems.

what plugs and wires did you install

NGK iridium plugs and Bosch wires.

Also I don't have the old ones anymore.

Check your engine coolant temperature sensor. Pot of water and a resistance tester. At room temperature (20C) the resistance should be about 3 kOhm, at operating temperature (80C) it should be about 0.3 kOhm for a 5SFE. The 7AFE's not much different. The full chart can be found in the Fuel Injection or EFI section of the factory manual.

is that the sensor in the radiator or the one on the block?

The one in the block, on the water neck. The one in the radiator is a switch for the cooling fans.

Just wanted to clarify. Thank you, I'll test it Sunday

Interesting... Mine is doing the exact opposite. After getting hot there is a delayed start, then the RPMs want to die and the engine dies. I wonder if we're having a similar problem.

Quite possibly. I replaced my IACV just to be safe. Took my car for a long distance test drive (15 miles) and my car overheated when I got back. The dash readout was in the normal range, but she was smoking pretty bad. I'll be doing a coolant flush, replace thermostat, and replace temp sensor Thursday. Gonna feel dumb if the thermostat was the underlying issue

Well, I replaced the thermostat, temp sensor, and did a full coolant flush. Took the car out for a drive today and didn't have any issues. Made multiple stops while out on a 30 mile drive since thats when the issue popped up the most. I'll be taking my car in to work tomorrow for a full shift so fingers crossed.

Sure as **** it was the thermostat. Not sure why i didn't check that in the first place. just glad to have my car up and running again! :runaround:

Just out of curiosity, how many miles is on your engine? I just replaced my thermostat (I don't think it's been replaced ever) and I'm at 165k.

I was curious if that was about the common range

My original thermostat lasted until about 325,000 kilometres.

As of right now my celica has 206041 mi. I changed the thermostat last summer when I replaced my radiator, so not sure why it failed. The week before I had serious issues, my car was idling at 1200 rpms at stop lights. No idea why I didn't think to change out the thermostat sooner.