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Unread 10-03-2003, 10:48 PM   #1
only in a jeep cj
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1986 CJ7 
 
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Motorcraft meltdown-ignition module!!!

Does anyone know what causes the Motorcraft ignition modules (under the water bottle on drivers side) to go bad and melt?????
My buddies CJ wouldn't run right...I found a huge amount of slack in the chain and replaced it.....at same time I found his module was melted (187K miles)
For the last week, my CJ with 165K miles, started acting funny during acceleration...mainly at around 1500rpms.....like it wasn't getting air, fuel, or the timing was off....once up to speed it runs good, but not perfect .I already bought the seals and chain and have the Jeep all apart now. Lots o' slack on the old chain (is 165K miles on the original chain good?!) And what to I find....my box is melted now...WTF. Is this common? Does high mileage/age wear it out or is it from the timming floating across a large degree span and screws up the box? You can tell a melted box from the wax on the back side is now clear and some has run out down the fender....it still works, just not 100%.
ANY THOUGTS ????
thanks

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1975 CJ-6 304 T15 Dana20 30/44 3.73
1983 CJ-8 258 T5 300 30/44 3.31 Looking for full or half hardtop buy or trade
1986 CJ-7 Laredo 4.6 stroker T5 300 30/44 3.31
1986 TJ-7 Trail Jeep project in the works
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Last edited by only in a jeep cj; 10-03-2003 at 10:54 PM..
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Unread 10-06-2003, 06:51 PM   #2
CSP
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I think you're running into a case of coincidence here. You do have to remeber though that the newest CJ is 17 years old. Those ignition boxes aren't meant to last forever.
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Unread 10-06-2003, 07:21 PM   #3
andyp65
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just a little off topic woulnt an MSD ignition system just completely imporve the performance and bypass the motorcraft ignition?
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1981 Blue Cj-7
33 Inch Goodyear MT/r
258 Inline w/ t5
[B][COLOR=red]BIG GUNS[/COLOR][COLOR=white] AND[/COLOR] [COLOR=blue] JEEP [/COLOR] OWNERS OF AMERICA MEMBER # 20 [/B]

And yeah its a real jeep with round headlights and leaf springs :)

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Unread 10-06-2003, 11:44 PM   #4
Sandman74
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I went to an MSD system top to bottom, swapped in a Holley 4barrel carb, and my 304 hasnt so much as hiccupped in over a year.
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Unread 10-07-2003, 08:44 AM   #5
andyp65
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good to hear thats what im prolly going to do with my 258 when i get out of boot camp. a friend of mine put an msd in his 4banger and well it mad so much improvements
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1981 Blue Cj-7
33 Inch Goodyear MT/r
258 Inline w/ t5
[B][COLOR=red]BIG GUNS[/COLOR][COLOR=white] AND[/COLOR] [COLOR=blue] JEEP [/COLOR] OWNERS OF AMERICA MEMBER # 20 [/B]

And yeah its a real jeep with round headlights and leaf springs :)

Semper Fidelis!
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