White powder from ignition wire - JeepForum.com
 
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post #1 of 6 Old 10-26-2019, 05:35 PM Thread Starter
TeamDem4
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White powder from ignition wire

Hey There,

I'm slowly working on building my wrenching skills by taking on easy projects. This weekend's plan is to change the plugs and wires. Tonight I decided to give all the spark plug wires a test pull to make sure I'd be able to access them and get them loose. When I pulled the center ignition wire from the distributor cap, a whole lotta white powder came pouring out. I'm assuming this is due to a loose fitting wire causing arcing in the boot and that a new wire will fix this issue.

Is my assumption sound or is there something more going on here that I need to investigate?

As always, thanks in advance for your help!

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post #2 of 6 Old 10-26-2019, 06:38 PM
mukluk
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White powder = corrosion on the metal contacts of the wires or the cap. Clean or replace the wires and cap, make sure the rubber boots of the wires fit snugly on the cap and apply a small smear of dielectric grease before connecting them to help seal out moisture.

2000 TJ SE
2005 LJ Rubicon
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post #3 of 6 Old 10-27-2019, 05:17 AM
Jonny Jeep
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White powder will be the aluminium post corroding, just the same type of corrosion as is seen on early mirror arms and tailgate hinges. I'd replace the cap, and that wire too, if not all wires. Using dielectric grease to seal the wires as mukluk suggests is also a good idea.
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post #4 of 6 Old 10-29-2019, 06:58 AM
SeanCucf
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Take pictures of the wiring, or mark all the wires and the cap before you take all the wires off. You don't want to mix up the firing order.
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post #5 of 6 Old 11-02-2019, 10:08 AM Thread Starter
TeamDem4
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Thanks for the advice!

One problem leads to another though, right . . .

I changed the plugs and wires, no problem. Went to remove the distributor cap, one screw came loose no problem. The other though is stuck good! I've stripped out the Phillip's head so tried a socket. It just won't turn and I fear putting too much on it for fear of snapping it or rounding it off. I've tried PB Blaster but I don't think it made it to the threads.

Thoughts or advice? Should I get an impact driver and try that?

Thanks

1999 Wrangler Sport
4.0 Liter
5 Speed Manual
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post #6 of 6 Old 11-02-2019, 10:23 AM
dln1962
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Quote:
Originally Posted by TeamDem4 View Post
Thanks for the advice!

One problem leads to another though, right . . .

I changed the plugs and wires, no problem. Went to remove the distributor cap, one screw came loose no problem. The other though is stuck good! I've stripped out the Phillip's head so tried a socket. It just won't turn and I fear putting too much on it for fear of snapping it or rounding it off. I've tried PB Blaster but I don't think it made it to the threads.

Thoughts or advice? Should I get an impact driver and try that?

Thanks
Put a flat drift against the screw head and tap it gently with a hammer. The steel screw is probably corroded in the aluminum housing. A few light swats might break it loose.
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