View Full Version : Cold start in the morning

09-11-2014, 03:49 PM
Hello all. So, my 2.2 95 Celica GT has this problem of a cold start in the morning. Meaning it won't stay running unless I keep the throttle down. It does "warm up" after a bit and is back to normal. However, lately its been doing the same thing in drive when I come to a stop-especially if I have the AC on. I shut it off, and the RPMs go up. My initial thought is the throttle position sensor. Any ideas? Thanks!

09-11-2014, 10:52 PM

This is my how-to TPS calibration. Also you want to clean out the idle speed control valve while you've got the throttle body off.

If you know the ISCV is clean and the TPS is calibrated then you may have a problem with the ECU. That's what mine did anyway

Also check vacuum leaks and there is an AC idle-up valve that runs from that center vacuum line on the bottom of the throttle body.