Author Topic: 91 2.3L in a CJ2A (Read 4482 times)

dillonwilkinson · « **on:** January 28, 2015, 10:09:04 AM »

I'm new here and I've read a few things on this page and it seems like the people on here are pretty knowledgeable so here we go. I have a 48 willy's jeep that currently has a carbureted 302 in it. the engine swap was done when I got it and it was really cool for a while until I snapped the frame. I found a new frame and always told myself that when I get to the point of putting the new frame in it that I would get rid of the 302 and go with something a little smaller. after doing some research I found a company that has a full adapter setup to drop a 2.3l in a jeep like mine. I have a friend with a 91 mustang that has a fuel injected 2.3l in it but I don't know much about them (this one has the dual spark plug setup). my question is what does that engine need to see to run? id like to keep the fuel injection if possible but what does the ecm look at to make that engine run? if I can figure that out then I can go through the rest of the wiring harness and get rid of unneeded wires. if this just seems un-doable then how could you convert that engine to carbureted? I've seen different intake manifolds for those so a guy can bolt on a carburetor but if you do that then what do you do about the fuel injector holes in the head?

amc49 · « **Reply #1 on:** January 28, 2015, 11:11:04 PM »

You will NOT be removing wires, rather installing them, a lot in fact.

oldkayaker · « **Reply #2 on:** January 29, 2015, 03:23:21 AM »

Below is a link to a 1991 Mustang wiring diagram for the 2.3 engine.
http://www.rothfam.com/svo/reference/90-91Mustang.pdf

pintoguy76 · « **Reply #3 on:** January 29, 2015, 06:35:25 AM »

If you want I can help you wire up the fuel injection for the 91 2.3. Its not as hard as some people make it sound, in fact its really quite simple. A half dozen or so wires at most.....I put that same engine into my 74 pinto. I got it wired right the first time, it started right up. Didnt have to redo it or anything. It runs like a dream...I even wired up the check engine light and the vehicle speed sensor....

My engine is the exact same thing you are talking about - 1991 Mustang 2.3 Distributorles s Ignition with 8 spark plugs.

dillonwilkinson · « **Reply #4 on:** January 29, 2015, 03:31:05 PM »

Thank you for the link oldkayaker. And for pintoguy76 I would love some help I would really appreciate that. I didn't think it would be too hard that's not that new of an engine I just don't know those engines like you guys do. How do you like having that engine in your car? How's the power and fuel economy?

amc49 · « **Reply #5 on:** January 29, 2015, 09:37:55 PM »

LOL, I'd like to see someone wire that up using only 6 wires. The injectors alone need five and they won't work without all the other sensors wired in as well. Way more than six wires if you look at that schematic. Easiest way is using the wiring harness and PCM that comes with the engine.

dillonwilkinson · « **Reply #6 on:** January 30, 2015, 12:15:03 AM »

That's what I planned on doing. Then just weeding out what wires I don't need from the harness. That's why I was wondering what all the engine needs to run ( sensor wise)

amc49 · « **Reply #7 on:** January 31, 2015, 12:01:32 PM »

Engine will need every single thing shown in that .pdf other than possibly the A4LD if you are running manual trans. Have fun wiring that IRCM module up. It controls fuel pump, a/c, and rad fan among other things. FYI fuel pump is inside fuel tank. Others here have gotten around that before.

You CAN do this, but absolutely not 6 wires only as said there. Engine needs every sensor in there, PCM will post codes and not run right if you dump any of them.

pintoguy76 · « **Reply #8 on:** January 31, 2015, 08:39:38 PM »

I'm telling you there are only a few wires on that engine that need to be connected. Believe me, I've done it. The 91 2.3 uses an integrated relay module that basically has one power wire that runs to it, and one to the computer.... then one to heated oxygen sensor. A few grounds, the fuel pump, a hot-in-run to the ignition and i believe that is it....it was not hard.

Most of the wires you see in that diagram run between the sensors/engine controls and the computer. Only a handful actually go outside of the harness. There were only three connectors (each with a few wires that connected elsewhere in the car) that had to be disconnected from the donor car to remove the harness from the car itself. Some of those wires aren't even needed... such as the check engine light wire and the wire for the tachometer signal. Most people don't even hook those up. There are a few others that aren't needed too. I weeded those out......

amc49 · « **Reply #9 on:** February 02, 2015, 01:53:24 AM »

OP's original premise....... .........

' my question is what does that engine need to see to run? id like to keep the fuel injection if possible but what does the ecm look at to make that engine run? if I can figure that out then I can go through the rest of the wiring harness and get rid of unneeded wires.'

You are assuming OP has the complete wiring harness, say it. He seems to say he doesn't, worlds apart there.

Highly over simplified and how people get into big trouble to begin with. Leave anything in that .pdf out and you will be pretty much walking....... ..........and why on earth would someone not hook up check engine light wire, self inflicted pain of the highest order and not smart at all. The O2 has a heater as well-one wire only wastes lots of fuel in prolonged open loop.

dianne · « **Reply #10 on:** February 02, 2015, 07:18:55 AM »

I got all that for 2.3 EFI I'm putting in. It has everything mostly including the computer and wiring harnesses. I was lucky as this guy saved them all.

Those can be pulled out of pretty much any fox body, can't they?

Pinturbo75 · « **Reply #11 on:** February 02, 2015, 07:46:41 AM »

what the person was refering to with the 6 wire comment is ..... with a harness for the engine there are only a few wires that need to be connected to the vehicle to obtain power for the ecu and fuel circuits... along witha couple grounds....som e people on here... who have never even attempted this swap,,,,, act like they invented it ..... if you have never done it and all your info is hearsay or what youve read.... then post the links up and shut the hell up

dianne · « **Reply #12 on:** February 02, 2015, 08:36:51 AM »

Quote from: Pinturbo75 on February 02, 2015, 07:46:41 AM

what the person was refering to with the 6 wire comment is ..... with a harness for the engine there are only a few wires that need to be connected to the vehicle to obtain power for the ecu and fuel circuits... along witha couple grounds....som e people on here... who have never even attempted this swap,,,,, act like they invented it ..... if you have never done it and all your info is hearsay or what youve read.... then post the links up and shut the hell up

I
ll post a zillion pics of the swap for the next ones. Pinto_one has done it, but a turbo I guess.

pinto_one · « **Reply #13 on:** February 02, 2015, 12:53:04 PM »

The wiring should be done after all the hard parts are in place and bolted down, wiring diagrams are out there for the year motor and ECM you are using , autozone does have the diagrams on line to copy and print, if you removed the whole harness from the car you will have to trim it down to shorten it, ECM placement is nice above the glove box , high and dry, max wire length from there is less than four feet, when you start to make your harness chose a place the is quite and free of kids , nagging love ones and phones, next clean the wire before you start cutting, use a good soap , do not use , MEK, lacquer thinner , it will remove the stripes on the wires, solder the wires together using a western union joint, and cover with heat shrink tubing , once you have every thing in place double check , once you let the smoke out of the ECM you can not put the smoke back in, its toast, learn what each sensor is and what it does, and where the wires goes , the more you learn the easy er the out come, and do wire in the plug for the code reader, I have seen a few people have cut that out , bad when your on the side of the road trying to figure out what is wrong , hope this helps some poor (sap) individual from letting the smoke out, later Blaine

dianne · « **Reply #14 on:** February 02, 2015, 01:25:34 PM »

Quote from: pinto_one on February 02, 2015, 12:53:04 PM

The wiring should be done after all the hard parts are in place and bolted down, wiring diagrams are out there for the year motor and ECM you are using , autozone does have the diagrams on line to copy and print, if you removed the whole harness from the car you will have to trim it down to shorten it, ECM placement is nice above the glove box , high and dry, max wire length from there is less than four feet, when you start to make your harness chose a place the is quite and free of kids , nagging love ones and phones, next clean the wire before you start cutting, use a good soap , do not use , MEK, lacquer thinner , it will remove the stripes on the wires, solder the wires together using a western union joint, and cover with heat shrink tubing , once you have every thing in place double check , once you let the smoke out of the ECM you can not put the smoke back in, its toast, learn what each sensor is and what it does, and where the wires goes , the more you learn the easy er the out come, and do wire in the plug for the code reader, I have seen a few people have cut that out , bad when your on the side of the road trying to figure out what is wrong , hope this helps some poor (sap) individual from letting the smoke out, later Blaine

We have Mitchell 1 and can print them if anyone wants.

amc49 · « **Reply #15 on:** February 02, 2015, 10:05:17 PM »

The swap is child's play but that is not what OP asked, one either can read or they can't...........LO L

'...what the person was refering to with the 6 wire comment is ..... with a harness for the engine there are only a few wires that need to be connected...'

Then he needs to make that perfectly clear, the answer was nothing like that and highly misleading. We can go even further to say car only needs two wires only....at battery terminals....a nd essentially still be correct but what good is that?

FYI, I have wired entire cars and drivetrains many times in my life; if comments directed at me. Piece of cake.

Yes one could pull wiring out of any car with the proper wiring in it............ the schematic is the thing, once you have that you are set to go. Some Ford ones are harder to read than others though, they change the style and layout up from time to time.

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Author Topic: 91 2.3L in a CJ2A (Read 4482 times)

dillonwilkinson

91 2.3L in a CJ2A

amc49

Re: 91 2.3L in a CJ2A

oldkayaker

Re: 91 2.3L in a CJ2A

pintoguy76

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dillonwilkinson

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amc49

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dillonwilkinson

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amc49

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pintoguy76

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amc49

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dianne

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Pinturbo75

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dianne

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pinto_one

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dianne

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amc49

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