Ignition control module - JeepForum.com

 
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post #1 of 13 Old 07-29-2010, 11:59 PM Thread Starter
jeep108
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Ignition control module

Think my icm is going south, starts, idles & runs for a little while, then stutters and dies. Won't start again till it cools down. I searched the forum and found several post about using an icm from an early 80's ford. My question is about the plugs, do I need to cut the plug off the old icm and splice it to the new one? Any thing else I should know? Thanks!


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Originally Posted by Opihi59 View Post
Welcome to the forum.
If you are a mechanical neophyte and have to repetitively intone the mantra of "lefty loosey," are a mouth breather and only own a hammer, it will be more of a challenge.
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post #2 of 13 Old 07-30-2010, 06:45 AM
Que89YJ
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Look at the team rush and nuttering it. Get rid of the ICM and the vacuum stuff for the pollution controls all together.
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post #3 of 13 Old 07-30-2010, 08:05 AM Thread Starter
jeep108
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Sorry, thought i had updated my profile,(Its been fixed), Its been nuttered and rushed. I did the team rush mod about 2 weeks before the trouble began, I kind of wondered if maybe all the new ignition parts put too much strain on the old icm but I don't really know how all that works. I have gotten rid of the vac stuff except the dist advance and egr.
How do you go about cutting out the icm without going to an hei system?

Find the"YJ of the month" contest in the stickies and participate!

Eph 6:13 -Therefore put on the full armor of God, so that when the day of evil comes, you may be able to stand your ground,


Quote:
Originally Posted by Opihi59 View Post
Welcome to the forum.
If you are a mechanical neophyte and have to repetitively intone the mantra of "lefty loosey," are a mouth breather and only own a hammer, it will be more of a challenge.
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post #4 of 13 Old 07-30-2010, 08:10 AM
Old4X
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Quote:
Originally Posted by Que89YJ View Post
Look at the team rush and nuttering it. Get rid of the ICM and the vacuum stuff for the pollution controls all together.
You have to keep the ICM, it is the ECM tht you can toss.

418 miles on 19 gallons of gas. Can't beat the BBD !
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post #5 of 13 Old 07-30-2010, 08:22 AM
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Or, go with an HEI and toss everything else.

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post #6 of 13 Old 07-30-2010, 08:59 AM
Que89YJ
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That is exactly it. Go to the HEI.

Last edited by Que89YJ; 07-30-2010 at 10:08 AM.
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post #7 of 13 Old 07-30-2010, 03:00 PM
greyarea
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I parsonally would not go hei as you have a good system as is you just need a quality module (Motorcraft) you can use one for an 86 ford bronco with a 351 in it swap the connectors it will work perfect. I have one that I was about to put on ebay for $20 but it is a parts store brand one and run for about 5000 miles if you want it.

90 YJ Magnum 5.2 v8 , 1'' BL, 1'' booms, 4" Procomp, 35/12.50-15 MTR/kevlar Ford 8.8 4.10 lsd Aussie and TJ shafts up front.
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post #8 of 13 Old 07-30-2010, 08:03 PM
Old4X
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The ground for your entire ignition system is under the cap on your distributor. Have you checked and tightened it? (it is the gold screw holding the wiring harness to the pickup in place).

Next, add a dedicated ground wire from the distributor to a known good ground to the battery.

These Jeeps are 20 years old or so, grounds do corrode and work loose.

418 miles on 19 gallons of gas. Can't beat the BBD !
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post #9 of 13 Old 07-31-2010, 01:28 AM Thread Starter
jeep108
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Thanks guys, yeah for now I would just assume stick with the system I've got since I just did the team rush & upgraded the coil.
Greyarea, I appreciate the offer but I think I've got a motorcraft here local that I can get pretty cheap.
Old4x, Thanks for the tip about the ground, never even thought about it but I'll add it as well
Thanks again

Find the"YJ of the month" contest in the stickies and participate!

Eph 6:13 -Therefore put on the full armor of God, so that when the day of evil comes, you may be able to stand your ground,


Quote:
Originally Posted by Opihi59 View Post
Welcome to the forum.
If you are a mechanical neophyte and have to repetitively intone the mantra of "lefty loosey," are a mouth breather and only own a hammer, it will be more of a challenge.
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post #10 of 13 Old 08-05-2010, 09:57 PM Thread Starter
jeep108
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Put an old motorcraft icm on, the difference is amazing

Find the"YJ of the month" contest in the stickies and participate!

Eph 6:13 -Therefore put on the full armor of God, so that when the day of evil comes, you may be able to stand your ground,


Quote:
Originally Posted by Opihi59 View Post
Welcome to the forum.
If you are a mechanical neophyte and have to repetitively intone the mantra of "lefty loosey," are a mouth breather and only own a hammer, it will be more of a challenge.
jeep108 is offline  
post #11 of 13 Old 08-05-2010, 11:09 PM
JPRatYJ
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i just got a brand new one with a lift time warrenty for 80 bucks now she starts like a dream EVERY TIME and i know im covered if it ever goes out again

/l ,[_____], 1990 YJ 4.2 Weber 34
l---L -[]lllllll[]- 4in Rustys, 3in body, 1.25 Shackles
()_) ()_)--o-)_) 33 Kumo's M/T and smittybilt tube fenders -----Johnny Rat-----
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post #12 of 13 Old 08-09-2010, 04:56 PM Thread Starter
jeep108
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Yeah, new probably is the way to go I just wanted to know it'd make a difference before I spent any $$$$ & the old one was free, did you buy one made for a jeep or go with the one for the early 80's ford?

Find the"YJ of the month" contest in the stickies and participate!

Eph 6:13 -Therefore put on the full armor of God, so that when the day of evil comes, you may be able to stand your ground,


Quote:
Originally Posted by Opihi59 View Post
Welcome to the forum.
If you are a mechanical neophyte and have to repetitively intone the mantra of "lefty loosey," are a mouth breather and only own a hammer, it will be more of a challenge.
jeep108 is offline  
post #13 of 13 Old 08-09-2010, 06:21 PM
JPRatYJ
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i went with one that was made for the jeep it was only 80 bucks with a lift time replacement....

/l ,[_____], 1990 YJ 4.2 Weber 34
l---L -[]lllllll[]- 4in Rustys, 3in body, 1.25 Shackles
()_) ()_)--o-)_) 33 Kumo's M/T and smittybilt tube fenders -----Johnny Rat-----
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