I did a search but couldn't find anything so I am hoping you guys can help me out. I have a bit of a strange question regarding IACs and which ones can be used on a 1990 5.0L. I have a modified 306 with a Terminator X system. Usually it runs well but I have had intermittent IAC issues since I bought the car, but was able to smooth it out by tuning the car. Recently I started having issues again (just a slightly high idle and occasional RPM bounce). I have tried switching out for another stock one and didn't see any difference.
The guy who I purchased the car from said it has an IAC from a Ford Focus installed, but couldn't remember which year it had come off of. I have looked online and seen IACs for both the Ford Ranger and Ford Bronco that look similar as far as mounting and where the inlets are located, but I am curious what the actual difference if any (other than the layout/form) is between each of these units? Does the IAC from a Focus, a Ranger, or Bronco flow any better than a stock unit?
I have everything to simply swap the IAC to a 4-pin GM style which I have been told runs better than the Ford units due to having a stronger IAC motor, but it would be nice to stick with the 2-pin since that is literally plug and play. I am also considering getting one of the IAC adjusters from LMR also to see if that helps at all. Does anyone have any experience with mix and matching IAC valves or using one of these adjusters? Are there any 2-pin IAC motors that would fit but breath a bit better?
The guy who I purchased the car from said it has an IAC from a Ford Focus installed, but couldn't remember which year it had come off of. I have looked online and seen IACs for both the Ford Ranger and Ford Bronco that look similar as far as mounting and where the inlets are located, but I am curious what the actual difference if any (other than the layout/form) is between each of these units? Does the IAC from a Focus, a Ranger, or Bronco flow any better than a stock unit?
I have everything to simply swap the IAC to a 4-pin GM style which I have been told runs better than the Ford units due to having a stronger IAC motor, but it would be nice to stick with the 2-pin since that is literally plug and play. I am also considering getting one of the IAC adjusters from LMR also to see if that helps at all. Does anyone have any experience with mix and matching IAC valves or using one of these adjusters? Are there any 2-pin IAC motors that would fit but breath a bit better?
out of it with brake cleaner. I'm almost more confused now that I had it off and looked at the part number that is on it. It isn't anything I recognized but it appears that the previous owner pulled the motor and the valve apart, switched out the valve and body with a different part (potentially from a Focus or Fiesta, gonna keep looking to try and figure it out exactly) but re-attached the original fox body IAC motor. So far so good with it just being cleaned though, hopefully that will fix me. If not, I'm just going to swap to the 4-pin and run the new wiring back to the Terminator X ECU.
