My Ford Focus idle rough only when the temperature is below 40 degrees. No codes come up.?

Question:
What sensor measures the outside temperature?Ive put a new IAC control sensor in, but it didn't help.

Answers:

Difference in automotive headlamps converversion kits?

could be coil pack. one way to diagnose this is to take a hair dryer or heat gun and heat up one sensor at a time and start the car. when you heat something up and it runs fine you know you found the problem. (if you heat up something heat it for at least 5 to 10 min. so you know the heat penetrated.also start with the coil pack) good luck

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Think head gasket gone on ka what are signs to look for and how much to fix?

Ford has had issues with engine mounts on them things.. but check with the Ford dealer and see if there isn't a TSB (a bulletin published by Ford) that may address this issue such as a reprogramming of the engine computer.

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What is a goldseal engine?

dirty thottle body or idle air control valve

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