No4x4Yet

I changed my plugs after work tonight. they needed it the electrodes were almost gone. when I got the old plus out there was something on the ends the the coil goes to. Im thinking its Di-electric? My check engine light is on and flashing now. I look at the car running and I can see sparks comin out from the plug boot. Im thinkin I need to put di-electric on the new plugs, but would that cause the check engine light too? Its running rough too. Im wondering if the old Di-electric is causing problems?

Destination XJ

I think I know what your problem is..

Go to the auto parts store and ask them for spark plugs, The style you got is not right for your jeep.

sflxj

You ripped off the the piece inside of the wire. just replace your wires. I always do do new wires with new plugs at the same time.

No4x4Yet

All so, how does the coil pack disconnect?? I pulledd off some red tab but it doesnt seem to want to move?

sflxj

is this what you have not wires?

No4x4Yet

Yeah I have that coil pack thing. I have the Haynes repair manual but they dont talk bout the newer stuff.

tommyxj2000

disconnecting that is a pain in the *****....just have to slowly and carefully pull the plug

No4x4Yet

What holds the plug on? Is it the red clip i already removed?

Turbo X_J

Remove the red locking tab, then press on the bayonet tab to release the plug from the connector. I don't bother with it just unbolt the coil pack carefully remove it from the spark plugs and place it out of the way. Add a small amount of dielectric grease to the inside of each plug boot when you reinstall.

No4x4Yet

Does the dielectric go in the boot or on the plug? I would think it could get on the end of the plug you want the current to go through if it were put on the boot.

bigA

I would also like to know the answer to the last post.. a dab of Di-electric in the boot or on the tip of the top of the spark plug?

Also: if you just pull off the coil pack and leave it connected to the connector, is there enough wireing loom to move it out of the way while still connected?

No4x4Yet

I can answer that for you. I learned the hard way, you really want to on the ceramic between the tips outside the head and the "nut" area. you need to keep the tip clean so the electric current from the wire can get into the plug. You dont want it passing by the boot and arcing on the block.

I had mine both arc and the di-electric kill the signal and cause misfires.

MachRanger

You might want to pull the new plugs and make sure the ceramic isn't cracked on the ones that are arcing. That'll cause arcing and rough running too. If there is a crack it might be so small that you can barely see it. Take some black grease and smear it around the ceramic and wipe it off. It'll stain any cracks and make them easier to see.

tjwalker

And don't use BOSCH plugs. There are more than a few threads of people using BOSCH that have had instant misfires, which went away when Champions were installed. Or for the 00-01, NGK is a good plug too.

No4x4Yet

I cleaned the di-electric from where it shouldnt be, was actually on the springs comin from the coil. Got it where it needed to be and its been running great since. Think I used autolite plugs, I really dont remember.