Cold plugs, cold weather cold start idle implications

[mnnice]

Originally Posted by TheBlizzard

If you car is harder to start when it gets below 30 degrees it is likely one or both of your coolant temp sensors are bad. If they are bad the ECU thinks the air temp is hot so it does not enrich the fuel enough to start it. I would check there first, if not your ECU could have issues as well.

this wouldnt throw a cel would it? my car has the same issues. it doesnt idle until it warms up

[TheBlizzard]

Originally Posted by mnnice

this wouldnt throw a cel would it? my car has the same issues. it doesnt idle until it warms up

Yeah it should throw a cel for sure because it will go into a default fuel map. And yes singletracker if one of those sensors are bad it will affect the starting in cold weather immensely. Under 30 degrees. If the head and leaks don't fix it I would next check tue ECU.