Check the operations of the IACV and clean the throttle plate and also look for vacuum leak

Also go to this link for more information: http://www.2carpros.com/articles/engine-surges

Answered by rasmataz
68 questions asked

I should mention that when I said cold I meant the ambient temperature. In warm weather the van operates normally. The surging and high idle occurs when the temperature falls below freezing. I have changed the temperature thermistor already and it has made no difference. No matter how long we let the van run, or how warm it gets(we drove 5 hours) it does not come off high idle. Any help you could give would be appreciated.

Response from Elmer Van Dyk
2 questions asked