DIS and DAT; about DIS Modules

[jmszkutnik]

Be sure when testing a DIS module on your car to fully install it with all (4) screws to the side of the intake manifold. One of the (4) mounting screws - I believe the lower RH ? (lower one toward front of vehicle) - provides the ground. Make sure both surfaces - the back of the module and the mating manifold surface are clean (hit them lightly with a file to remove any nicks or standing corrosion). Use the proper heat sink grease to allow the best heat transfer. Heat is the enemy of these modules. Also have the manifold properly bolted to its mounting bracket, completing the ground.

Some of the parts stores must have module testers with the parameters tighter than they need to be. That is, if they test the 6 functions of the module and a couple - "dwell" and "threshold" for example - give a failing result, it may still allow the engine to run fine. (and i don't mean "limp mode"). Without actually dynoing the thing, i don't know what you might be giving up in terms of horsepower / reliability for a parameter such as dwell or threshold that's a little out of spec, but not toasted. My own experience has been that two modules with "out of spec" or "failed" parameters feel just fine in all respects and have perforned well.

With much disagreement with a local parts store, I have also found the F1SF module and the E9DF to be fully interchangeable. He was saying the aftermarket part numbers are different for an '89 and a '93, for example, and so are the tests called for. Looking into it a little farther, I found that even though the tests call for a different "test file", the actual parameters were the same.

Best Luck,
Jeff

 

[Phoenix]

Allthough very good infos , everything stated is already known.

:thankyou:

 

[hawkeye18]

What is this I don't even

 

[firebat45]

DIS module from a Thunderbird SC works too.

 

[KyngofPop]

What is this I don't even

^ :laugh_ti::laugh_ti:

 

[HotRodKid]

i beleive the rule is "if it LOOKS like the right DIS, it IS the right DIS"

 

[jmszkutnik]

Allthough very good infos , everything stated is already known.

:thankyou:

Thanks, Phoenix. I looked around briefly and didn't see another thread with similar info. This forum has been so helpful to me over the years that i thought it might help someone. There are alot of great people who are generous with their time in showing others how to get through some head scratchers without an expensive vist to the local dealer.

I still have the loaded '89 I drove off the showroom floor when new. .. loved it so much i've kept it all these years and have 4 more (Gen1 & 2) to boot!!


thanks again! - to everyone!

 

[hawkeye18]

Damn, you've been here for four years and have so far made 2 posts, both in this thread? That's incredible... you take the lurker king crown, sir.

 

[Bob Gervais]

Thanks, Phoenix. I looked around briefly and didn't see another thread with similar info. This forum has been so helpful to me over the years that i thought it might help someone. There are alot of great people who are generous with their time in showing others how to get through some head scratchers without an expensive vist to the local dealer.

I still have the loaded '89 I drove off the showroom floor when new. .. loved it so much i've kept it all these years and have 4 more (Gen1 & 2) to boot!!


thanks again! - to everyone!

Even though some of us knew the info, it's still a good thread to have on the forums for search purposes.

Thanks for posting!

 

[Bob90lx]

I appreciate you making this thread. It was the top of a search when I was trying to find what type of grease to use on the dis.
Thanks!

 

[hawkeye18]

I appreciate you making this thread. It was the top of a search when I was trying to find what type of grease to use on the dis.
Thanks!

And thank you for using the search function instead of creating another "What kind of grease do I use on the DIS?" thread! :wave:

 

[luigisho]

You have to use grease?

 

[hawkeye18]

You have to use grease?

 

[jmszkutnik]

Grease

Omitting the grease won't keep it from running just fine, the grease improves the ability of the DIS electric componentry to shed heat. The back of the DIS module is a thick aluminum plate to pull heat from the components, and it's mounted to the end of the aluminum intake manifold, so the aluminum plate can then shed heat ( conduct it away ) from the electrical components. The grease keeps the smooth bare aluminum contact surfaces from corroding (further reducing heat transfer across the surfaces). The grease also takes up any minuscule irregularities in the two surfaces that would impede heat transfer. If you don't have any heat sink grease on hand and don't feel like a trip to the parts store, wipe a little "Never-Seize" on the surfaces. Never-seize has a metalic component that wont' run off when it gets really hot. Another option at home is milk of magnesium (Malox) that conducts heat well, will prevent corrosion and won't run out of the contact surfaces. Leaving the grease out is not recommended, especially if you live where the car's exposed to salt/corrosion or very hot climates. The grease will help you get the max life of the DIS module.

 

[luigisho]

Yeah I knew all that. I was being a douche.