Alright, since doing my GT40P head swap, I can't get my Fairmont to make the 2-3 shift on the C4. Here are some things I've already done:
1) Saw the kick down lever was lazy to return back to the normal spot. So I added a spring at the carburetor to make sure it goes back. Now it's worth noting that I have a holley carb on the car in place of the stock Motorcraft 2150. This puts the kick down lever in a slightly different spot over stock, but I feel pretty confident that it's in the full "forward" position regardless
2) Checked for vacuum. Was pulling 11-13 whatevers of mercury by putting my vacuum gauge down on the vacuum control modulator end
3) Replaced the vacuum control modulator
4) Checkded for cracks in the rubber lines as well as pin holes in the metal line all along the route. I see nothing
5) It does have a decent leak somewhere and had found over the time I had it down (we're talking 8-10 months) it was close to 2/3 qt low on fluid. I've since topped it off.
So I'm out of ideas. It ran fine before. Could having a higher compression motor now (after the head swap compared to the stock heads) changed my vacuum levels? I'm making things up at this point. But I'm out of ideas.
Connect With Us