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Does not start due to rain water seapage in spark plug

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2001 chevy blazer wont start when raining. will start after a lot of cranking

Check your secondary ignition system, cap, rotor, wires. I suspect either the cap has a lot of condensation in it and is not allowing spark to the plugs or the plug wires are getting wet and leaking spark before it can get to the plugs. Should be pretty easy to check after a long hard rain or if it has been some time since you last tuneup these items along with spark plugs are most likely due for replacement anyways.

I’m happy to assist further over the phone at

Oct 05, 2014 | Cars & Trucks

1 Answer

Have to replace spark plugs after heavy rain on 02 dodge grand caravan sport

well when it rains really bad and water gets under your hood either it goes in your oil and you have to replace it or it gets in your air filter and in your engine to get the water out pull all the spark plugs and crank it untill there is no more water coming out then put the plugs back and dont forgot to change your air filter

Jan 18, 2013 | 2002 Dodge Grand Caravan

2 Answers

Gilera runner 125 st 2008 cuts out by arcing

coil lead plug cap needs replacing , no shield to protect spark plug from getting wet due to weather/water splash. electrical spray lubricant requires from damp start problem

Dec 29, 2012 | 2008 Gilera Runner ST 125

1 Answer

Moped not starting when raining or high humidity.

on a dry day when its starting fine spray all around the spark plug with hair spray its a cheeap and easy fix it worked for my suzuki gn 125 motorcycle every few weeks it needs done but it should sort it out basically whats happening is that due to dampness the electricity must be shorting out and not throwing the full kick into the spark plug i recommend going around any electrics that sit out and spray them its a great water seal

May 28, 2012 | 2008 Jonway yy1501

1 Answer

Does not start when it rains

Check the distributor cap for cracks etc. You can usually tell it has a crack as there is a "carbon trail" on the inside. If the cap is cracked then it needs to be replaced.

When condensation forms inside the cap due to rain the electrical arc will travel across the water inside the cap instead of going to the spark plug. This is usually the most common culprit.

If this doesn't solve the problem let me know, and we'll go from there.

Apr 05, 2011 | 1995 GMC Safari

1 Answer

No spark at spark plugs and coil has tested good, there is sufficient current at pick up off the cam as well, bike ridden through hard rain and started acting up during ride and eventually shut down 10...

Sounds like the water got in somewhere crucial and is preventing the components from telling the coil to spark.

Don't laugh now, but try hitting any suspect areas with WD-40. I recently learned the WD stands for water displacing. It was initially invented as something that could remove water. But it is flammable so exercise caution.

This is surely frustrating and thankfully it doesn't happen often to Harleys. I sure hope you find the source and get it sealed.

I rode with a group of 15 bikes from south WI to the eagle rehab place up in Minnesota. It rained on us for almost 90 minutes but not one bike quit running. So, when things are sealed as they should be, Harleys can run in the rain.

Hope you get this solved and get back on the road.

Aug 09, 2010 | 2003 Harley Davidson FLHRCI Road King...

1 Answer

During a ride in the rain I lose eninge power and the sound changes. Is it due to water in my intake?

I would guess that water is shorting out one of your ignition wires to one of your spark plugs.

Mar 30, 2010 | 2003 Buell Lightning XB9S

1 Answer

Engine stall -- now it won't start won't steer

If Gas mixes with water, combustion is impossible. Not only is the fuel bad, the lines and spark plugs are messed up. Water will also mess up the electrical lines and the cars computer.
First, get some gasoline drying solution. That takes a day or two to work. When the water is removed from the gas tank, add fresh 100% gas. Pull all the spark plugs and clean the ends and check the gap for proper distance. Make certain the plugs are clean and dry before you reinsert them into the ports. Dry and clean all spark plug wires. Check you battery also. It should not have corrosion on the poles. If they have a coating, clean them and make perfect contact with the power cables. Try to start the engine now. Good luck.

Jan 11, 2018 | 1998 Jaguar XJ8L

1 Answer

The car runs great when it is not raining but when it rains it will not start and takes a long time to start i just replaced the cap and rotor and it ran well untill this last hard rain on this1999 dodge...

sounds like water is getting into the spot were the spark plugs are and is arking so you might want to get new wires and make sure that there is no water geting into the place were the plugs are.

Oct 26, 2009 | Dodge Stratus Cars & Trucks

1 Answer

No problem when fine, but when it starts to rain it is a nightmare. I can start the car when it rains but after I've drove the car, if its only down the road, it seems to get wet and won't start. It needs...

Rain going to inside...could be radiators, thermostat,.... air filter,.... spark plugs,...or alternator. Look like need replace. The motor doesn't like water. When you drove on downhill?

Or... its cold start? could be throttle or carby need lubricant spray. Spark plugs need new aswell or clean. For start up to quick.

Jul 13, 2009 | 2001 Daewoo Lanos

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