Carburetor issues
Ford Trucks for Ford Truck Enthusiasts
I also have a 1985 Ford F150. Like most 1984 - 1985 F150s, my truck came with the dreaded feeback carburetor and TFI/EEC-IV ignition system. When I took possession of my truck about 5 years ago, mine was like yours - BOTCHED. Missing emissions components, vacuum lines missing or hooked up wrong, you get the idea. It ran, but gas mielage was terrible and power was even worse. I was in the the same boat as you. If you want your truck to work correctly, you have two choices:
1. You need to put ALL the smog equipment back on the truck, along with ALL the sensors the truck originally came with. MAP sensor, O2 sensor, EGR, Thermactor system, feedback solenoid, canister purge solenoid, catalytic converter...you get the point. The fact is, the EEC-IV computer your truck has needs ALL of these inputs to run the truck correctly. This is a very expensive and time consuming route to go, not to mention you are going to have a tough time finding a mechanic, including FORD who even knows anything about the feedback carb system.
Or do what I and most people who drive these year trucks do: the Duraspark II (DS2) conversion. Duraspark II is a stand-alone, high-energy, reliable ignition system that Ford used for almost all of their vehicles from 1975 to about the mid-80s. If you had a 1975 - 1983 Ford F150, it would have had the Duraspark II ignition system.
2. Check your emissions testing in your area, and make sure you can finish removing the smog equipment, all associated sensors, and then the feedback carburetor (which probably needs to be rebuilt anyway) and finally the EEC-IV distributor and ignition components. Then go and get a conventional carburetor, and a Ford Motorcraft distributor for a 1983 Ford F150. You will also need the following ignition components for a 1983 Ford F150: ignition coil (canister type), Duraspark II ignition module, and the wiring harness to hook everything up. I strongly reccomend going with genuine Motorcraft parts.
Do a serach for "Duraspark" and there should be lots of information on the conversion. This is how I learned to do the conversion on my own truck. The beauty of the Durapark II conversion over aftermarket ignition systems is that you will be using all Ford Motorcraft parts from the same year, and you should be able to go into ANY parts house in ANY town for replacement parts.
Option 2 will be MUCH cheaper than the option 1, and your truck will run MUCH better and probably get better gas mileage too. Good luck!
First off, do yourself a favor and do NOT use AutoZone or Advance Auto Parts, O'Reillys, etc. for electrical components, unless they are selling Motorcraft parts. If you must go aftermarket, go to CarQuest or NAPA. Their parts are MUCH better quality. You can also check junkyards for these parts.
For the ignition system, you will need, all for a 1983 Ford F150:
1. Distributor
2. Ignition coil
3. Ignition module
Now would also be a good time for a new cap and rotor, spark plugs, and plug wires.
***Note: You are not going to find the wire harness from a parts house. You are going to have to go to a junkyard for that. Almost any Ford from about 1975 to 1983 will have the harness you need. You already have most of the DS2 harness on your truck. The only harness you need from a donor vehicle is going to be the part that connects the distributor to the ignition module and the coil. It will also have the two wires for your temperature and oil pressure gauges.
As for the carburetor, that is whole other ballgame. I would suggest doing a search on this site or make another thread. If you are going to stick with a 2V, any carburetor pre-1984 will work. It just has to be a non-feedback carburetor, but most carburetors are. You can also convert to a Holley 390 4V carburetor...





