Have Ford Questions? Ask a Mechanic for Answers ASAP
Hi, I'm Ron and I will be helping you today.Stand by for a moment while I prepare your answer.
The most common repair is replacing the engine coolant temp sensor.
This acts like a choke did with carbureted cars years ago.
It richens the fuel mixture for better cold start operations.
Here's what a bad one looks like testing with a scope.
Thanks again and please remember to rate me 5 stars and keep this link in case you need me again later on.
Hi, I'm just following up with you to see if you have any more questions.Thanks, Ron
no change when I changed the CTS. I really didn't think this was the problem because it isn't what you might call "cold". It idles roughly with a loping type idle that sometimes shuts off. The hard line vacuum lines have been patched but these look sound.
You need to smoke the intake then, it sounds like there's a vacuum leak down there.