Cold starting

[bhd125]

I have a 1992 Corolla, when the engine is cold the engine will start and run for about 15 seconds and then starts to stumble, you turn the engine off and restart it and it will run fine. Once the engine is warm it will restart. No codes but have replaced the coolant temp. sensor, any ideas?

[wheredoesthisgo]

How many miles. What do you know of the last service?

[bhd125]

It has 202,000 miles with the routine maintenance.

[Bitter]

bad cold start injector or associated circuitry perhaps?

[FinalGear]

Just hop to Autozone troubleshooting section on their website and narrow down the problem...

[punter]

Sounds like a vaccume leak, check all the hoses on/from the intake for cracks or leaks.

[Bitter]

vac leak would cause a high idle

[bhd125]

How many ohm's should the cold start injector be?

[punter]

Originally Posted by Bitter

vac leak would cause a high idle

Depends how big a leak it is.

[Bitter]

Originally Posted by punter

Depends how big a leak it is.

maybe i have my gens mixed up, but the 6th gen was map based also or did it have an AFM? with an AFM unmetered air can cause stumbling/lean problems. on a map system an airleak behind the throttle will just cause a chronic high idle.

[punter]

Ah I assumed all the US spec ones were AFM, my bad.