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So I've been having a weird issue that will randomly happen. Sometimes ill drive my truck a few miles park it at the store, come back and it will not turn over. It takes me having to jump my battery to get my trunk to turn over. I've noticed that its usually when its cold and if the truck is sitting at an angle or on a slight incline. I had a backfire recently also. If i'm at a complete stop and give it to much gas at once it almost wants to shutoff and is pretty sluggish until i get going and its pretty responsive after that. Could this be a carb, fuel pump, or alternator? Or a mixture of all three? Where should I start? Its a 68 F100 with a 302 that is in great shape. Currently has gunky looking Carter AFB carb and the PO said that he would look into another carb in the near future.
Ok, first we need to get your terminology correct. Are you saying that it won't turn over? Or that it cranks but won't start? Not turning over has nothing to do with the fuel system. (Unless it's flooding so badly that it hydro-locks a cylinder.)
Turning over, but not firing up could be any of several things.
You say you have to jumpstart it? That points directly to a bad battery... get that tested first.
Check for spark quality at a plug. Red/orange is bad. 90 per cent of carburetor problems are ignition related. Carburetors need rebuilding every few years though.
A thorough GOOD tuneup will get you where you want to be. Make sure ignition is 100%, no vacuum leaks, and carb adjusted and tuned.
The electric choke requires power. I'd have to research what voltage the Carter AFB needs. If 12V then power it off the "s" terminal on your starter solenoid. Originality for electric chokes needed 7V.
The electric choke requires power. I'd have to research what voltage the Carter AFB needs. If 12V then power it off the "s" terminal on your starter solenoid. Originality for electric chokes needed 7V.
So i'm guessing the PO rigged up the choke to stay open all the time? That could possibly be the issue of the backfire and running rich?
Looks like the cable tie is holding the choke plate open. Do you live in warm climate?
I live in the piedmont area of North Carolina. We do have some warm summers but also have some cold winters being near the mountains. For the float bowl and PCV what would you recommend i do? Sorry this is the first truck i've ever had thats had a Carb so i'm still learning. Thanks!
Just leave the float vent open. If you are running a PCV valve then that hose would run to the valve cove with PCV valve in it and other valve cover would have a fitting that hooks to the air cleaner body. If no PCV valve then leave it plugged.
