I need some help and/or advice. I have a 1970 F100 Sport Custom with a 302 with Automatic (C4) Transmission. The motor cranks good and does not smoke, knock, ping or use oil. It idles good (when warmed up). The issue is that when I ease down on the gas pedal, the motor will stall. If I press down a littler farther, it seems I can get past the stalling and the motor will rev nicely. If I burp the pedal fast, it doesn't stall and revs up good. When I drop it in gear, the motor will run a little hesitant and as I give it some pedal it stalls the same way. I've driven it down the road recently and it stalls the same way, but if I mash it down more, it seems to get past a point of stalling and runs pretty good, but I'm going to fast by then,
. It has an Autolite 2100 D carburetor that I cleaned and put a new kit in. I'm the second owner, as my neighbor bought it new. My dad told me that the motor has been rebuilt. From all indications it has a 351 cam in it. The heads were changed when it was rebuilt apparently. The firing order is that of an H. O. 302. Before I purchased it, the truck had setup (outside) for about 5-6 years. It would not crank then. I've put in new: spark plugs, spark plug wires, points, condenser, rotor cap, distributor cap, distributor breaker plate assembly, fuel filters (the one at the carburetor and the one at the fuel pump), modulator valve, PCV valve, choke pull off valve, fuel sending unit, oil sending unit, fuel line hose, coil, solenoid, battery (used, but strong), etc.
This is what I know about the mechanics of it. I've timed it at 6 degrees with a good warm idle. I don't have a tach. The plugs are gapped at .032". The points are .018". I've adjusted the carburetor as best I (a novice) know how by the specs. It has an automatic choke. It has a dual diaphragm vacuum advance and a dist-o-vac system. When I purchased the truck, the dist-o-vac was bypassed. I tried running the truck as it was intended to be in 1970 with the lines connected to the dist-o-vac and so forth. Of course this was before I put a lot of the new stuff on. In order to finally get the motor running I routed the front hose from the vacuum advance to the carburetor and the back hose to the block at the back of the intake where another hose routes to the transmission. This is the way it was connected when I purchased it. I have sprayed around the carburetor with WD-40 and traced the line to the transmission with WD-40, but I don't detect any vacuum leaks. The lines/hoses look good. Recently, I disconnected the wires to the dist-o-vac box under the dash thinking that for some reason there might be a false reading through the ignition or something. There was no change in the issue, so I connected them back.
I've cleaned out the (rusty) fuel tank and blown out the lines from the tank to the carburetor. I've checked the canister filter several times and detect no trash. The truck has 77,000 miles on it and I don't know how many since the rebuild. I wonder why it was rebuilt. I remember my neighbor driving by at a snails pace many many times in the truck when I was growing up. I know he didn't "raw hide" it. He was very conservative and took care of his stuff. I'm not a mechanic at all, but thanks to fordification.com I've learned a lot. If anyone has any ideas, I would very much appreciate it. Thanks.
Jeff
