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Old 04-23-2008, 08:18 PM   #1
huckster
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Default Need advice for feedback carburetor

I have a 1983 2.3 liter Ranger with the 4 speed manual transmission. I want to replace the carburetor, but it appears that this one is the feedback model. I live in a state where emission testing is not an issue, can I replace the carburetor with a non feedback unit? What is involved in doing this?
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Old 04-23-2008, 09:07 PM   #2
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I had the nonfeedback carb on my '84 2.3. No better performance, but, the idle jet was adjustable. I had to unplug the ECU. I ended up pulling that engine and puting a turbo engine in.
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Old 04-23-2008, 10:06 PM   #3
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Using a non feedback carb will work but will mess with the computer. The computer controls the timeing electronically so if you unplug the computer no more advance = poor preformance.

Since you don't have to worry about emissions you could convert the ignition to the duraspark ll. This would allow you to get rid of the computer and the feedback carb. The duraspark disributor uses vacuum and mechanical advance. I did it on my 2.8 and wish I had done it sooner. Overall preformance is great.

The 2 links below are from the Tech Library and explain the duraspark. The 2nd is for the 2.8 but the wiring would be the same irregardless of the # of cyls.
You would need the ignition parts from a '78 2.3. The Pinto would work.

http://www.therangerstation.com/tech...rasparkII.html
http://www.therangerstation.com/tech...Duraspark.html
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Old 04-23-2008, 10:48 PM   #4
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Thanks for the replies. This leads me to another question. In my Haynes manual it shows diagrams for both a feedback and a nonfeedback carburetor. Did some of the trucks come without the computer if they had the nonfeedback carburetor? It appears that the only difference is the feedback solenoid isn't on the nonfeedback carb?
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Old 04-23-2008, 11:56 PM   #5
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Yes. The computer uses the feedback carb to adjust the fuel/air mixture.

I did some checking and the '83-'84 2.3 used the duraspark ll, which doesn't use a computer or the feedback carb. But if yours has the feedback carb, it mosy likely has a computer and the TFI ignition. Check your distributor and if has a module on the side it is TFI. If it has a vacuum line on it it is duraspark.
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Old 04-24-2008, 03:20 PM   #6
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Jorley or anyone,

I need some more help - I know that there is a box mounted by the coil on the drivers innner fender liner that says "Duraspark". I can't remember if there is a vacuum line to the carburetor, but I think there is (I can't go look at it at the moment).

There is also a larger box mounted on the inner fender liner on the passenger side that has wires and some vacuum lines running to it (at least one of the vacuum lines runs to where the smog pump used to be). What is all in this box?

I think that this truck had California emmissions on it, but can I just get rid of that stuff and go with a non feedback carburetor?

I might be asking a lot of newbie questions, but this is the first vehicle that I have done any major wrenching on - it isn't worth enough to pay someone els to work on, so it is up to me to fix it. Thanks for any help that you can provide.
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Old 04-24-2008, 05:14 PM   #7
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You have the duraspark ignition. Since you don't have to worry about emissions you can go ahead and get rid of the feedback carb and all the emission stuff.

The only vacuum lines you need are 1 for the PVC system, 1 for the distributor , 1 for the brake booster and if you have cruise control you need one for it. Make sure to plug the vacuum lines that you don't need.

Also if you haven't yet, do a complete tune up(plugs, wires, all that good stuff).
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Old 04-26-2008, 11:34 AM   #8
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I went through the same stuff on my 1984 ranger... the computer controlled carb was a joke and was a pain to adjust. I found a 1978-79 mercury car with a L6 in it and it had the exact carb without the feedback, didn't cost me anything but a rebuild kit and it runs nice and I can adjust everything now. Like the other guy said the ignition has its own computer of sorts and its just controlled by the vacuum advance on the carb. Let me know if you have any questions about it, I had to work on just about anything electronic on mine.

Shawn
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Old 04-27-2008, 03:03 PM   #9
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Absolutesantaja,

I do have some questions.

1. Did you leave the electric choke on the replaced carb?

2. There is a plastic box on the fender well on the passenger side by the battery. What is all in here?

3. Did your 1984 have the smog pump on it? If so, did you leave it intact?
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Old 05-01-2008, 08:22 AM   #10
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I do have some questions.

1. Did you leave the electric choke on the replaced carb?

Yeah the carb i replaced it with used the same kind of electric choke so i just swapped them out... only difference was the choke wasn't rivted on the one i replaced it with

2. There is a plastic box on the fender well on the passenger side by the battery. What is all in here?

That box holds whats sorta of a computer. It was used to adjust fuel air ratios in the feedback carb as well as control EGR valve, some control valves for the smog pump system and other vacuum controlled stuff. Mine didn't have a smog pump on it and had all the wholes plugged in the manifold so i didn't bother trying to replace it. I'm planning on getting a nice high flow cat and not worrying about the rest. I'm just gonna remove that box and trace down any wire that are important but there really aren't any. All the wires for the alternator and the ignition module aren't part of those wires so you just have to trace everything down make sure you don't cut anything thats still being used.

3. Did your 1984 have the smog pump on it? If so, did you leave it intact?
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