3 different wires with same results.
Thread Starter
CF Veteran

Joined: Apr 2014
Posts: 1,181
Likes: 60
From: Florida
Year: 1999
Model: Cherokee
Engine: 4.0l
So i tried 3 different brand plug wires, specifically the middle one on the cap that goes into the ignition coil. No matter the brand i use somehow the middle plug magically pops off randomly despite being snug and clicking into place. i did NOT lube the boot and everything looks all hunky dory in terms of the cap post and boot and inside said boot. im just stumped on why its this middle plug that keeps popping off just enough to not have spark, but once i click it back down im back in business. I have never heard of this annoying issue before.
Old fart with a wrench
Joined: Nov 2010
Posts: 14,398
Likes: 740
From: Manlius, east of Syracuse, NY
Year: 2000 XJ Sport & WJ Laredo
Model: Grand Cherokee (WJ)
Engine: 4.0L
I have, but it involved blowing the cap off when they had spring clips. 57 Ford had a fuel pump leak into the oil pan. Fuel vapors traveled up the distributor shaft and blew the cap off. 3 times in one night! Oil smelled strongly of fuel, replaced pump.
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