Curb idle setting 1985 Motorcraft/Holley 4180C

limp said:

As the General says, there should be 3 screws that hold the black choke part on..
Personally I would loosen those and twist it so the choke isn't even working to take it out of the search for whats causing this.
There is also a Choke pull off, that applies vacuum to the choke flap when the car starts... Check if its working.. If its losing vacuum and allowing the choke flap to come back on, even a little bit, this could raise your idle....... Pull off the vacuum line to it and attache a hand held vacuum pump and see if it holds vacuum.....

Best way to adjust your choke is to do this in the morning after letting your car sit overnite.. ... DO NOT turn the key on at all... You do not want to heat up your choke coil..
loosen the 3 screws and adjust it so the choke flap just barely opens or starts to open... Tighten the 3 screws and that at least gives you a good base to start from.. Although my experience has been that there is usually no need for more

You have been giving many things to check by people on here... Can you tell us what you have done so far?????

Click to expand...