Inline 6 on a 0411 pcm - JeepForum.com
 
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post #1 of 5 Old 09-18-2021, 06:28 AM Thread Starter
Thorwon
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2007 JK Wrangler 
 
Join Date: Jan 2009
Location: Commerce
Posts: 106
Inline 6 on a 0411 pcm

I've got a 1988 MJ that just will not stay running. When I get one thing fixed something else goes bad.
I think the biggest problem is the guy I got it from never cleaned under the hood. There was literally an inch of oil and gunk on every thing under the hood.
I'm going to build a GM computer system to bun it on.
So, if I'm reading correctly, I can run a inline 6 on a 12200411 pcm. I'll need to put a 3x crank trigger and a 1x cam signal.
I can run port fuel injection and a distributor for ignition. I'll be machining my own crank reluctor and maybe building a custom distributor. The pcm I'll be using is a 12200411 pcm with a 4.3l V6 bin.
Has anyone ever done this?
I've read several posts where people said they were going to do this but they never finished the project or just never posted that they did.


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post #2 of 5 Old 10-20-2021, 05:38 PM Thread Starter
Thorwon
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Join Date: Jan 2009
Location: Commerce
Posts: 106
Well it runs pretty good for the first time I started it.


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post #3 of 5 Old 10-23-2021, 06:32 AM Thread Starter
Thorwon
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Join Date: Jan 2009
Location: Commerce
Posts: 106
Well the computer I'm using isn't the 0411. It's from a 2004 Chevy Astro van. I got the harness, computer and sensors for less than $100 at a upull it.

I have put a couple more videos on youtube so check them out.

https://www.youtube.com/channel/UCqg...HdZk5huUMnj6sg

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post #4 of 5 Old 10-27-2021, 10:15 AM Thread Starter
Thorwon
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2007 JK Wrangler 
 
Join Date: Jan 2009
Location: Commerce
Posts: 106
Well I've had to change up the distributor. When I installed it I didn't think about where in the crank rotation the sink signal was sent to the computer. I am getting a sink error.
I have no way to look at the signal so I'm guessing.
So I set the engine at TDC #1 and the reluctor was about 90 deg from the signal coil. I then rotated the distributor and reset the plug wires appropriately.
It idles much smoother and runs stronger.
This is a learning experience so I'm figuring it out as I go.
I guess I'm going to have to buy an oscilloscope. And then learn how to use it.

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post #5 of 5 Old 11-06-2021, 09:38 PM Thread Starter
Thorwon
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2007 JK Wrangler 
 
Join Date: Jan 2009
Location: Commerce
Posts: 106
So I got the O2 sensor hooked up today and on the short test run I made it really helped it. I'll be driving it about 60 miles tomorrow, so we'll see how it does.
I'm running one O2 with it hooked to the input to both bank 1 sensor 1 and bank 2 sensor 1. I'm using bank 1 sensor 1 12v to heat it. I turned the DTC off for the other O2.
I've also got the fans running off the computer.

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