Having problems with your 2004 Toyota Corolla ?
When cold starts up fine idles up then comes down and stalls stumbles.when eng. reaches about 150 160 degs. eng. levels out and runs fine.
Possibly cleaning the I-Idle A-Air C-Control Valve can have an effect on the idle at certain temperatures.
Check and make sure the egr valve is good. this is a start
Repair Help & Product Troubleshooting for 2004 Toyota Corolla
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