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How to fix distributor cap from getting wet - GMC Cars & Trucks

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Posted on Jan 02, 2017

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SOURCE: My Nissan Xteraa Check engine light is on

unscrew the cap and pop off and use a hair dryer to dry out than screw back on again

Posted on Aug 27, 2009

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SOURCE: Engine - distributor cap got wet and engine


you can remove it and dry it out, use a hair dryer if possible, be careful to look how it comes off as it needs to go back on the same way, it helps if the rotor arm is left on and not moved, ensure the car is turned off also.

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Posted on Dec 30, 2010

Testimonial: "Thanks for this information-- it was very helpful in my situation where my car hit a puddle and wouldn't start."

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2 Answers

How to Replace Dist. cap

Shouldn't have to replace it. Just take it off any let it sit to dry it out. I've sunk one of my trucks and the distributor got wet and it was fine after letting it dry

May 15, 2014 | 1999 Mazda Millenia

2 Answers

Engine got wet

Water on the spark plug wires will do this, especially if your car has a distributor that is not solid state. Water gets inside the distributor cap of the older vehicles and shorts the spark to other cylinders than the ones intended which causes the rough running.
To push the water off the wires and out of a distributor cap, spray WD-40 anywhere you do not want the water so you can run the vehicle. Be very careful if you do this inside an older cars distributor cap since The WD-40 will also break down the bearing lubricant down the shaft. Use this in an emergency to get you home etc, then see a mechanic to make sure you didn't cause any bearing issues.

Aug 26, 2012 | 2003 Ford Mustang

1 Answer

When taking off the car acts like its going to die and keeps stalling especially when wet out.

If this is a petrol engine and if it is at its worst in wet weather then you may have a spark plug lead problem or crack in the distributor cap. Run the engine when stationery and view the spark plug leads and distributor cap at night in the dark and get someone to rev it up and watch for sparks around those areas, New leads or cap will be required.

Apr 28, 2011 | 1999 Chevrolet Malibu

1 Answer

1994 Ford Escort GT 1.8 Ltr - Car stops running for no reason - Will restart Replaced Distributor Replaced Fuel Pump Checked Ignition Mod at Advance - Passed Test Car cut off yesterday again and...

Let's start with the basics. Did you notice any wetness in the distributor cap? or wetness in the coil wire boot at the coil? if you saw wetness in the distributor cap? You have a cracked cap and spark would be sporadic.
If you saw wetness in the Coil boot? The coil is bad. When the coil is bad the engine will stall when the coil gets hot. Also check and make sure ground wire from engine to firewall is very tight and clean. Actually any connection can be lost if its dirty , loose or both. I would check wires (Plug) going to coil and distributor reseat them by taking the plug off and using an electric spray cleaner and blow them out with an air gun to prevent cleaner shorting out the system.
Please leave me good response and feedback on here .
Keep in touch ask me more after you try all these and you have no luck

Jan 12, 2011 | 1994 Ford Escort

1 Answer

The fix engine light keeps coming on the obd code is p0300 wich is random cylinders misfires ive changed the plugs wires cap and rotor twice each and still get the same problem its worst when its wet even...

Try putting some dielectric silicone grease in the boots on the spark plugs and a thin layer around the distributor cap. There should be a seal on the distributor that seals the joint between the cap and distributor. Park it in a garage and use a blow dryer in the distributor cap / distributor.

Nov 27, 2010 | Chevrolet Silverado Cars & Trucks

2 Answers

2004 taurus wagon misfires when it gets wet, rain, wash, etc.


Nov 02, 2009 | 2004 Ford Taurus

4 Answers

Suburban 99 no start after a raining outside

There is a drain in the distributor that gets clogged up and holds moister under the cap.It is like a vent .So i would replace the cap and rotor and check the vent hole the will fix the issue :)

Sep 09, 2009 | 2004 Chevrolet Aveo

1 Answer


why, idk. Where, well the only way oil could be getting into you cap is if for some reason it's coming up the distributor shaft. I've worked on many distributor vechiles and NEVER came across this problem. But there is a first time for everything.

Jun 14, 2009 | 2001 GMC Jimmy

1 Answer

Engine won't start in wet weather

Check your distributor cap for cracks. Sounds like you are getting condenstion under the cap.

Mar 16, 2009 | 2004 Chevrolet Cavalier

1 Answer

Car gets really slugish when wet

Sounds like moisture is getting into the distributor cap. Try putting a thin film of petrolium jelly around the lip of the distributor cap where it seals down onto the distributor. This should stop the water from getting in.

Aug 02, 2008 | 1996 Oldsmobile Cutlass Ciera

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