Ignition Coil Boot

[Phoenix127]

So today I discovered the cause of my E420’s bogging under load and random misfiring. This problem has been occurring for years when the weather is damp and recently became much more pronounced. I heard a vague tapping coming from the drivers headlight area. After some digging I discovered visible arcing coming the inboard coil wire boot! The arc was jumping from the boot opening to the coil‘s center core. It was quite vivid. I found the boot terminal corroded with green oxidation and the coil insulator coated with powdery brown deposits.
I tried to clean up the connection but it was pretty clear I needed new wire ends.
Fortunately, I found several sources for the Beru coil boot with the threaded ends. Hopefully this helps someone with ignition issues.

 

[tomer]

Hi, can you advise where you found sources for the Beru coil boot with threaded ends? I just swapped a severally corroded coil wire (coil was filled with the green oxidation of death so I installed a new coil) with a used wire I got on ebay, but would prefer to fix my corroded coil wire as it is only a year old. Thanks!

 

[Phoenix127]

Hi, can you advise where you found sources for the Beru coil boot with threaded ends? I just swapped a severally corroded coil wire (coil was filled with the green oxidation of death so I installed a new coil) with a used wire I got on ebay, but would prefer to fix my corroded coil wire as it is only a year old. Thanks!

They were less than $20 from the dealer. Part number is printed on the boot 0001592942. These boots are different from those on the distributor because of their male end that presses into the coil.