D.U.I. Distributor

Would anyone care to comment on the D.U.I. Distributor? Or share the link my search came up empty.

The ad is as quoted from 4wd: "This is a simple, drop in unit. The coil is inside the cap and the module is inside the distributor. Just run one 12-volt wire to the distributor and you're ready to run! There is also an optional tach hook-up. The D.U.I eliminates ALL of the messy wiring found on stock AMC electronic ignition systems".

I took the 74 CJ out for the firt time this season and had several sudden engine stalls starting last fall. I turned off the engine and restarted several times until I got back home. Some restarts sounded like a misfire. I have a Motorcraft module now and was thinking it is going bad.

How do you replace the distributor cap with this type of system?

Thanks,
Maverick

 

Do a DUI search on this site and you should end up with a wealth of info.

I love the DUI. It is a drop and run unit, and enabled me to clean up the wiring in the engine compartment. The jeep is starts faster and does not have dead spots in the power curve anymore. There are other opinions out there, but my preference is the DUI.

According to the DUI website, you can use a replacement cap from any parts store.

http://www.performancedistributors.com/amcdui.htm

Happy hunting!

 

With the DUI you can even replace the coil aand control module with stock GM parts if you have too. I burned mine out because of my own stupidity and the stock parts worked fine in the DUI unit.

I loved it for the reasons stated above. Easy starts. Clean wiring. Simple to install and troubleshoot.

 

also search HEI on the forums here. Same system, DUI is just the high end brand name.


BTW: the HEI/DUI is a great upgrade. My jeep has never started easier or idled smoother even in icy cold weather.

 

Just a comment - you have lots and lots of options with the AMC distributors.

I would be reluctant to just throw parts at the problem. The DUI is a fine product, and it is their version of the GM HEI distributor. But it's expensive for what it is, and IMO you have not isolated the problem to the distributor and/or ignition.

On a '74 you should have the Delco points distributor, or maybe the Prestolite electronic distributor. The Motorcraft Duraspark was not used on Jeeps until 1978. Are you sure of what you have? The Duraspark is a fine distributor, equal or better to the HEI.

 

pertronix anyone??? way simpler than changing the dist and works mint...

 

Just to add to the question here....

Are you guys saying that HEI=DUI ??

So the $100 dollar unit listed in the 4WD harware catalog is just as good as the $300 dollar unit with the DUI name brand on it?

I was under the impression that the GM style HEI distributor didnt contain the control module inside it and the DUI did, thus the major price difference.

http://www.4wd.com/productdetails.aspx?partID=15086 $100

http://www.4wd.com/productdetails.aspx?partID=6348 $300

 

Yep, DUI=HEI, mostly. By definition, the HEI has an internal module. The DUI is a spiffed-up HEI.

Don't consider this a recommendation though. I'm leery of the HEI distributors for Jeeps in general.

 

Yep, works gud with the Delco points distributor. And you can add the MSD Cap-A-Dapt and use HEI wires and a hot coil, if you want.

 

Care to elaborate as to why? I'm def interested.

 

I do not have the points, the PO had it set up this way. It has the distributor with its Motorcraft module. You are right I have not isolated the problem. Sudden stall outs and with some rocky restarts and backfire followed by a smooth run only to do it over started my mind in the direction of the ingnition system. However it is one of the few items not replaced in the rebuild if comparing old to new has any elimination value.

 

It would help to post a picture of the distributor. I expect it's a Duraspark distributor. You can use the HEI module with a Duraspark distributor - that's what I'm running on my CJ-6. You can remove the potting compound from your Motorcraft module and run a "stealth HEI." Keeps the same wiring and everything. http://www.junkyardgenius.com/ignition/jeep/HEI01.html

 

A search would turn up plenty of material.

Main two reasons:

The Chinese HEI distributors have a reputation for eating cam gears.

I think the TFI'd Duraspark is a superior design.

 

I searched and read Dante's write-up and a few other threads. Seems you can swap out the old dizzy drive gear for the one on the HEI. Anyone got a source for a new replacement bronze gear? Or since gears usually wear a pattern together would it be best just to use the old one?

 

I've been running the old gear for 3 or 4 years now. no problems to speak of. I haven't pulled it out to check wear though.

if you want new ones check out www.bulltear.com

 

I have a couple partial shots on my photo bucket I will try to get something more close.

 

http://s1010.photobucket.com/albums/...at brackets/

Here is the link, I will post closer pictures soon as I can find my camera.

 

Link doesn't work. Redirects to the Photobucket front page.

 

I have a 85 CJ7 that I just finished converting to HEI. There is a lot of discussion on the web on the subject, especially the gear hardness issue. Jeepfourm.com has good discussions and links to other writings you can read. After reading a lot of the discussion I almost changed my mind about the swap. I ordered a gear separate from the HEI unit I purchased in case it came with a hardened gear. I tested the one on the HEI unit when it arrived and installed it. So far, so good.
The HEI unit I purchased was less than $60 plus $10 shipping.

If you need a gear there are several sources to obtain the softer units. You can get them from 4wd or NAPA and others.

If you are interested in wires I bought a set that fits a mid 90's 4.0 L. They have the correct ends for the HEI and are the correct length.


Let me know if you need any more info or pictures.

Happy Jeeping

 

Thank You!