Another thought on COP failures

[Gus_Mahn]

I'm having small coil on plug issues again. In my experience it's the boots that fail more than the actual coils do. 90% of the time the car's misfire can be fixed by installing a new boot and new spark plug. I'm getting ready to do this again, but I'm going to add a little more insulation to the coil/boot and to seal the actual joint between the coil and boot.

Rescue tape/self vulcanizing tape is perfect for this application with high dielectric strength and outstanding heat resistance. There are several manufacturers, but here is one made by MSD.. MSD markets it specifically for this application.

The car's in the trans shop right now, but I'll update this thread as I actually do this. Any thoughts?

 

[G-RELL]

... Once it starts to go the damage has already been done... I would replace a try these ideas on new ones...only time would tell.

 

[Gus_Mahn]

... Once it starts to go the damage has already been done... I would replace a try these ideas on new ones...only time would tell.

I don't believe that the misfires are necessarly a sign of a failed coil winding. On my car, misfires have been a sign of failed insulation. New coil boots and plugs have allowed my car to soldier on with the same coils even after misfires. I've gone a minimum of 10,000 miles misfire free after changing the boots and plugs several times.

 

[G-RELL]

I am saying there are many levels of failure, and its almost impossible to determine how much damage has been done.... 10k is not enough to call just a boot repair a success. I do agree you will probably benefit from better insulation on the boot, but would not recommend it suspect coils...

 

[bearsfan39]

I'm having small coil on plug issues again. In my experience it's the boots that fail more than the actual coils do. 90% of the time the car's misfire can be fixed by installing a new boot and new spark plug. I'm getting ready to do this again, but I'm going to add a little more insulation to the coil/boot and to seal the actual joint between the coil and boot.

Rescue tape/self vulcanizing tape is perfect for this application with high dielectric strength and outstanding heat resistance. There are several manufacturers, but here is one made by MSD.. MSD markets it specifically for this application.

The car's in the trans shop right now, but I'll update this thread as I actually do this. Any thoughts?

i do feel like everyone quickly assumes its the coils so we just replace the whole thing, i've never actually taken apart one but i do find it hard to believe that the whole thing fails so frequently

 

[lincoln ls_250k]

I too have seen many boots fail on COP set ups on many different models. 3.5l
Maximas are BAD about this.