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Wont start when damp - Cars & Trucks

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  • Wylie Johnson Apr 09, 2015

    Hi jeffrey l huber, I want to help you with your question, but I need more information from you. Can you please add details in the comment box?

  • Wylie Johnson Apr 09, 2015

    what kind of car



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I used to have a car that wouldn't start when the humidity got over 70%, so once a year, usually in the spring, I bought a can of WD-40 and sprayed everything connected with ignition, including the inside of the distributor cap and the inside of the distributor itself. This stuff displaces any trace of water and effectively seals it out of the ignition related stuff. Give it a try, if it doesn't help you're just out the cost of a can of WD. It has lots of other uses, like the door hinges, inside the locks, and if it's a hatchback, hit the back parts as well.

Posted on Apr 10, 2015

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This usually is a sign of ignition. check the condition of wires and distributor cap if it has one, also check all electrical connections for looseness and dirty/corroded connections.

Posted on Apr 09, 2015


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Will not start when its damp out. when not damp starts right away thank u mike

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Aug 24, 2007 - Posted in the Chevrolet Astro Forum. Leave a ... 2000 astro, Hardstarting or wont start when wet, once started its fine. I replaced the cap, rotor, gas filter, next rain was hard to start but did after about 10 tries. ... I have a 2000 astrocargo van. 4.3 v6. ... look for a faulty coil. mine passed out in a rainy day.

Van won't start in wet weather - Chevrolet Forum - Chevy ... > ... > Past Chevy Truck, SUV & Vans > Astro
Sep 22, 2007 - I have a 1999 Astro Van and nearly everytime it rains or sometimes when I wash it, it will not start. ... I really like my ASTRO for everything from carrying family, boat, trailer, etc. but if it is not resolved its going before someone gets hurt. ...When it was damp out, the coil case would become wet, and the ...

Jan 18, 2016 | 1987 Chevrolet Astro Cargo

1 Answer

Jeep wrangler wont start when its damp outside

ever get a tuneup this decade?>

the spark wires are bad. oldest issues on earth. this.

bad ignition. tuneup time. full,. do the 60k, mile.

when foggy or damp the crap spark wires, suck in the water

and this shorts out the high voltage. feed.

for 100 years, now, less so with COP coils.

Sep 25, 2014 | 2000 Jeep Wrangler

1 Answer

Engine will not turn over after cold weather

which engine?

cranks but will not start or remain running

tune up time, cold damp cause spark parts bad

oldest story in world. damp conducts, bad insulators do wet.

end result , bad spark.

flooding ? crank wide open throttle, (oper, guide, on start page.s...)_

check spark..,got spark to all cylinders


try test fuel, if not flooded,

starts then stalls?

Jan 11, 2014 | 1998 Toyota Avalon

1 Answer

1994 previa wont start when its damp outside

Often a sign of faulty plug wires or cap and rotor.
The moisture makes the spark jump around too much.

Jul 11, 2012 | 1994 Toyota Previa

1 Answer

95 Cadillac fleetwood wont start does not seem to be getting spark what should i do?

What is engine size? Use a gage and check proper fuel pressure. My info says 41--47 psi, 5.7L engine.
Can you park on level ground to do testing? Visually check for spark at the plugs. Can you check if system is running rich or lean? How long since overall tune-up?

May 07, 2017 | 1995 Cadillac Fleetwood

1 Answer

Wont start when damp

sounds like sparkplug wires might need replacing

Jan 22, 2010 | 1995 Isuzu Trooper

1 Answer

Jeep wont start when it is damp or raining.

It is probably your ignition wires. When moisture can penetrate the wire it shorts is out. Check them for cracking and especially where they are close to the exhaust manifold. I hope it is due for a tune up, this should take care of the problem. If not, you may have a dirty connection in the ignition circuit. Check all you connectors for corrosion and spray them out with a penetrant/moisture chasing lubricant.

Oct 10, 2009 | 1998 Jeep Cherokee

1 Answer


well he should know to check spark ect

Jul 03, 2009 | 1992 Audi 100

1 Answer

2005 hyundai accent wont start

try this? remove all spark plugs and dry them out use a heat source ie gas hob? if wife permits?? then spin engine over to clear cyl/s and refit warmed up plugs ? if you have wd40 or ignition damp start? spray all ign coils/leads electrical connections/ or see if wife will let you use hair dryer and carefully blow ign leads/coils etc then try restart ? this may be a simple case of damp plugs/ignition and engine/plugs are flooded from dampness trying to start after snow ? wish you luck please update on progress

Dec 31, 2008 | 2000 Hyundai Accent

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