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Old 02-18-2020, 03:13 PM
CLL CLL is offline
230 Tornado
Join Date: Feb 27, 2017
Location: Marshall, NC
Posts: 15
Leaky electronic ign!?

Hey all, I've got a 1980 J10, and just noticed the Motorcraft unit on the drivers side fenderwell has some clear gummy drool running back down on the sheet metal under it. Everything seems fine with the truck otherwise. What's the heck is going on? Thanks, Chris
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Old 02-18-2020, 04:09 PM
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babywag babywag is online now
out of order
Join Date: Jun 08, 2005
Location: Land of froot loops and cukcoo-nuts, CA
Posts: 9,611
When modules get too hot they can melt goo out.
Could be from an old module failure too?
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Old 02-18-2020, 06:46 PM
Jeeper555 Jeeper555 is offline
232 I6
Join Date: Feb 22, 2017
Location: United States
Posts: 27
Take a closer look, hope those are just some kind of grease.
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Old 02-19-2020, 12:22 PM
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tgreese tgreese is offline
Join Date: May 29, 2003
Location: Medford MA USA
Posts: 11,159
The modules are "potted;" that is, the circuit board and components are put into the aluminum case which is filled with liquid plastic, known (not surprisingly) as "potting compound." The module is mostly a big transistor that handles the coil switching that was in prior years handled by the opening and closing of the ignition points. If something goes wrong, the module overheats and could melt the plastic block.
Tim Reese
Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
Browless and proud: '82 J20 360/T18/NP208/3.73, Destination ATs, 7600 GVWR
Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
GTI without the badges: '95 VW Golf Sport 2000cc 2D
ECO Green: '15 FCA Jeep Cherokee KL Trailhawk
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