Honestly, I not even sure what half that stuff is. I was told by the mechanic that owned it before me that it was the carb. That's all he told me. How much would it cost to get her running right again then? Cause it sounds to me like I have to buy a bunch of parts.
If he was a mechanic and knew what the problem was, why didn't he fix it. My guess is that he was making an optimistic guess.
A feedback carb just means the fuel is able to be adjusted by the computer, which uses measurements from sensors to decide how much fueling it needs. The O2 sensor is the primary player--the computer adjust the fuel, gets feedback from the sensor about what happened downrange, and it adjusts it again. The other sensors are used in the decision, but the ECM isn't watching them for changes. For instance, if the throttle position sensor is open, the computer doesn't try to close it. Or if the atmospheric pressure is one thing, the computer isn't trying to make it another thing. The O2 sensor, the computer IS watching it, seeing where it is and trying to move it to where it should be by adjusting the fuel control solenoid. The carb itself has nothing to do with feedback--it's a feedback system that controls it.
Just from looking at a diagram of the carb, it looks like the fuel control solenoid may control the pressure in the float chamber. The difference in pressure on either side of the main jets is what ultimately decides how much fuel flows through them. Putting a plate over the fuel control solenoid holes should make it into a normal carb IF the flaot chamber is vented to atmosphere AND the jets are correct for an atmosphere in the float chamber. Another thing I see in this diagram is something they call a
temperature compensated pump. It looks like fuel from the accelerator pump flows through this thing on it's way to the shooters. It may be to protect the catalytic converter from too much raw fuel, or to give it more raw fuel when it's cold to heat it up more quickly. Whatever the case, it point to the stupidty of the entire system--computer controlling something with a pump on it that squirts in raw fuel.
A non-feedback carb doesn't exist. It's just a regular carb that meters fuel the old fashioned way via pressure differences in the venturi and various ports which are valved by the position of the throttle plate. The Weber I suggested is adjustable in every way. Once you take the computer out of the system on that feed-back 2150, what parts are available to tune it to run right without the computer? I see an enrichment valve in the diagram--how is that set up to work with the fuel control solenoid? It has a hose coming off of it, it looks like? Does it vent into the fuel control solenoid controlled float chamber? What happens when you vent it to atmosphere? On a Holley, you can screw in different power valves to kick the enrichment in at different manifold pressures. Is that enrichment valve supposed to see manifold pressure? How can you adjust it?
You can't tune that crappy thing. A Weber or even a Holley you can tune all three stages of fueling: idle, transition and main circuits, plus you can tune the accelerator pump volume and duration. All that 2150 has is a blocked off idle mixture screw that doesn't do anything above an idle anyway.
The ignition box I suggested is $30 from Jegs. It will control any ignition that has a magnetic trigger. It has 4 wires: two to the leads from the pickup, a power lead with full voltage, and a wire to the negative terminal on the coil. It does the same thing as the junkyard module does, and probably doesn't do it any better. It's not magic and it doesn't matter that it's not a Ford part. It's only job is to saturate the primary windings in the coil more thoroughly and accurately than a set of bouncing breaker points. i would like to see what the magnetic pickup looks like, and maybe see an ohmeter reading across the leads just to make sure there isn't anything unusual with your distributor.
If you do change the carb, or disable the fuel control system, leave the O2 sensor in there and hook an ohmeter to it. It will be useful in tuning it.
Welcome Visitor! Please take a few seconds and 
