Hi all, I have the '77 Maverick with 250 A/C Automatic Trans. I just finally got the right air cleaner assembly on the engine along with the newly rebuilt Carter YFA carb. I had to reroute all the vacuum hoses and set them according to the Mitchell diagram that Bluegrass shared with me. Problem-The car runs normally in gear, but just revs at a high high idle. I have made the proper adjustments on the carb and have backed the screws off till they are almost out. I have the electric choke wired up, but don't have anything routed from the engine(exhaust manifold I would presume) to the screw-on port on the choke. I have no previous part or diagram to go from on this. I would think there should be something there to heat the spring inside the choke and kick it off????? The distributor vac advance is hooked up per the diagram teed off of the intake manifold port up to a port near the top of the carb next to the air cleaner ring. Can anyone tell me what part's I am missing for the choke and where I can get them? Also, is this the reason for my high idle problem or could it be something else? Any response would be appreciated. I'm trying to get this car running right. Mechanical restored right first, then the bodywork. Regards, Ralph
I once used a new unbent tube of brake line and bent it so that I was able to hoseclamp the one end to my exhaust and that solved that problem for me at the time. Of course I made sure it fit on the threads of my choke. AS i mentioned before, you might want to check the vacuum with a guage to your dist at idle and at off idle.
If you are useing an electric choke you dont need exhaust heat to actuate it. The choke gets power from the alternator to heat the bi-metallic spring in the choke housing which in turn moves or unwinds the spring opening the choke. On my mustang (85GT 4BBl) you just have to tap the throttle to get it to come off of fast Idle. There is a fast Idle screw that allows you to adjust the warm up rpm's. this mechanism/lever should fall free of the linkage when the choke is warmed up and you tap the throttle. This may need some further adjustment to get correct. Also, check for vaccum leaks as these cause high idle too.. hope this helps..Jerry M.
Ref: High idle/choke problem??? So, with the electric choke I don't need a connection between the exhaust and the choke. My electric choke is attached to a connector on the starting solenoid. Should I re-route that to go directly to the alternator? In that case, what is the brass screw(male type) on the side of the choke(not carb) for? Is there a part of the linkage that would attach to the choke there? What exactly is supposed to be attached to that?
I'll try to find some pics and post them for you, Shouldnt need heat tube with an electric choke. I'll get back to you on this..:confused: I guess some older ones had both a heat riser setup and an electric assist this is from an old manual I have. hope this helps..
