Coils getting "fried" after washing engine

[LieutenantCracker]

1999 Mercury Grand Marquis:


My friend has the same year, make, model as my car, and he fried one of his coils ("coil-on-plug" type) after degreasing engine. He used a spray-on degreaser, & washed it off w/ a garden hose "mist-nozzle".

He had the same prob two different times-- fried a different cylinder's coil the 2nd time.

Before I recently degreased my 1996 Lincoln Town Car, I checked all the ignition-related wires (as best I could), & now it's stumbling as though one of the cylinders isn't firing. The lincoln has an EDIS system, where the coils are away from the plugs-- if that makes any difference.


The coils (coil-on-plug type)& fuel injectors on the Grand Marquis in a "valley" on either side of the eng, where water settles around the boots. But if I cover the whole "valley", that area won't get clean!

Someone once told me that before washing/degreasing my car's engine, I should put dilectric grease or vaseline in/around rubber seals & gaskets, electrical connectors, etc-- the little places I wouldnt want water to enter.
Would that REALLY keep water out of the coil/plug chamber. Wouldnt the degreaser take the dilectric grease off?

They also said something about using STP wire dryer (a water displacer)-- BUT NOT WD40, b/c it can damage rubber components.


I've also been told to go to the car wash, spray on the degreaser, then just spray the engine w/ high pressure water.-- Seems to me like that would greatly increase the chances of getting water into places you don't want it (?)...
________
Home Made Vaporizer

[Blue)(Fusion]

Common problem. The COPs are especially susceptible to water damaging them. The EDIS is a little less finicky, but can still cause issues.

Use dielectric grease on the COP or wire boots. Use it liberally. But really, you shouldn't use water around the COPS or ignition system anyway. Avoid it. Scrub it with a damp rag if you have to but don't spray water there.

[way2old]

Originally Posted by Blue)(Fusion

Scrub it with a damp rag if you have to but don't spray water there.

Agree 100% with this.