- posted
13 years ago
2001 Taurus rough idle in AM
- Vote on answer
- posted
13 years ago
I suspect your ECT (engine coolant temperature) sensor is at or beyond it's limits for correction by the ECM. This is the sensor that tells the ECM or PCM (computer) your engines operating temperature - not the one that is read by your dash guage. It is not uncommon for it to not set a code if the computer is able to eventually get a useable signal. Another comman malady causing this is a dirty/failing MAF sensor. Easily cleaned with no residue electronic cleaner and a cotton swab with a little care. It can be easily damaged and rendered useless. There are several sites here on the net with instructions and photos of cleaning the MAF sensor.
Lugnut