Engine barely idles when cold. on 1995 Saturn SL

I changed the PCV and the MAP, but still no better. Runs fine when engine is warm.

by in Colorado Springs, CO on January 31, 2012
1 answer
ANSWER by on January 31, 2012
Check the coolant temp sensor connector and sensor for corrosion. It is on the drivers side in the cylinder head. It has two wires coming off of it and has an oval shaped connector. Squeeze the larger sides of the outside circumfrance to remove. It may be necessary to replace both the sensor and connector if you are unable to clean the terminals on the sensor.