[googoo]

Im tired of chasing gremlins in my ignition system. To solve a past "no spark" issue,I changed all the components in my 90yj (carbureted) ignition system. Only to face the no spark issue again.....Does anyone know how to get rid of the electronics altogether and move to a point based system? ?

 

[camarozz]

Well, you could just go to an older HEI type set up; but I suspect you may have an ECU issue if you have not considered it yet.

 

[googoo]

ECU was bypassed during the Nutter. Im outta patience. Sure as shit ain't gonna replace the ICM every few months

 

[groovetrain]

I'd imagine it'd be as simple as finding out what years the 4.2 had points ignition and getting yourself to a pick-n-pull. That information has got to be out there. The 4.2 didn't change much during it's run, am I wrong?

 

[camarozz]

I'd imagine it'd be as simple as finding out what years the 4.2 had points ignition and getting yourself to a pick-n-pull. That information has got to be out there. The 4.2 didn't change much during it's run, am I wrong?

True, but an electronic ignition is much better. I believe there is an HEI direct swap upgrade that all you need is 12v to the plug.

I will see if I can find it...

 

[camarozz]

Yup, here it is.

GM HEI Distributor on Jeep 258 I6 Engine

 

[Ibuildembig]

AMC Jeep 232 258 Inline 6 Hei Distributor with 50 K Coil WPM Hei 11 R | eBay

 

[camarozz]

AMC Jeep 232 258 Inline 6 Hei Distributor with 50 K Coil WPM Hei 11 R | eBay

Yup, easier and more reliable than the old points systems.

 

[googoo]

Thanks a million for that info and link. Def gonna look into that

 

[MisplacedDesertRat]

AMC Jeep 232 258 Inline 6 Hei Distributor with 50 K Coil WPM Hei 11 R | eBay

So Regan, would you recommend this GM based mod over the Ford based TFI mod?

(just thought I'd ask since I seem to recall you have an affinity for Ford power...)

 

[Ibuildembig]

A Ford based TFI? You lost me on that one.....

 

[MisplacedDesertRat]

Sorry, I meant the Team Rush upgrade which is based on Ford parts if my memory is correct. I could be completely off base on that though..

I am asking because I was researching doing that upgrade when I found this thread and like the simplicity of this option. Also, after watching the Golden Eagle build I

 

[Ibuildembig]

Hell you threw one by me, I've never seen that before but it makes sense. I know that all the 4.2's used a Ford 300-I6 ECM and share the same firing order. I think if you can source the parts cheap enough I would do that instead of the HEI.

 

[googoo]

Post Nutter By-pass

Guys, This ECM is a non issue. I did the Nutter bypass, so the ECM doesnt compute. I dont get how i can just lose spark overnite. It has to be the ICM..???? AND, Im hearing that to do the HEI thing will do away with the need for an ICM...Right?

 

[Ibuildembig]

It deletes your ECM, coil, and all associated wiring

 

[roadyrob]

HEI is self contained, the module is in the dizzy along with the coil. 2 wires, one hot for ignition, one to the tach. CRT on ebay makes a good one, be careful with the cheaper ones, many have a hardened gear that will destroy your cam.