1997 4.0 keeps destroying ignition coil cylinder 2/6


wildstang

Forum Member

Joined
Feb 17, 2026
Messages
18
Points
101
City
ORANGE
State - Country
VT - USA
Vehicle Year
1995
Vehicle
Ford Ranger
Drive
4WD
Engine
4.0 V6
Transmission
Manual
Total Lift
stock
Total Drop
stock
Tire Size
235/75 R15
On going problem. This truck has destroyed 3 ignition coils. Middle coil for cylinder 2&6. Blows the interior 25amp fuse. Put a coil on it, seems to run for a short period, then runs rough, drops power then shortly after blows the 25 amp interior fuse. Before I put this last on on I changed plugs and wires. Blew 2 different ignition coils before I changed plugs and wires.
I’m at a loss what is causing the short or resistance. It’s been always the middle coil gets destroyed. I have ohmed them before and after.
For the plug in, the red/light green puts power to it. I’m assuming the yellow/red is coil 3/4 cylinders, yellow/white 2/6 cylinders, yellow/brown (or black) is coil for cylinders 1/5. Where does wire yellow/white go? I’m beginning to think I have a short in that.
Thanks for any help
 

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Also after the first 2 I guess stock or original equipment coils cracked, I bought a Blue Streak. Truck was running good for I’ll guess 50-100 miles then yesterday same missing low power then blew 25 amp fuse. Only this coil didn’t crack and all 3 coil packs ohm just under 12k which is what the were before. I had another original equipment one I put on, replaced fuse. I ohmed it and all 3 were in the 12k range. It started but running rough. Drove it 25 feet into parking spot in front of my garage and quit. Blew fuse and destroyed middle coil.

Actually it may have started to destroy the blue streak one. I just noticed a split in the plastic on the bottom. But like I said still ohms good and no cracks on the top
 

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