Question about 2000 GMC Denali

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I have a 2000 yukon that when we have rain or wet weather fails

When ever it rains or the weather in winter is damp the truck fails to start.

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Its humidity that penetrates the iginition coil.check your wires,coil pack and spark plugs.have you changed them recently.it might be time for a tune up.

Posted on Oct 04, 2009

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


Astro won't start or very hard to start when damp or rain ...

www.topix.com > Chevrolet Astro
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 ...

chevroletforum.com > ... > 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

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2006 ford free star when it rains the PCM gets wet and runs rough. Today it has rained for 3 days @ won't turn over. Battery is fine. Only a problem when it rains.


Rain should not affect your car starting. It sounds as if your battery is failing. Put your headlights on and get someone to turn the key with you looking at the headlights. If they dim to a glow-worm, your battery is not powerful enough. Sometimes a cell will fail and although your get 12 volts, you don't get enough cranking amps.

Regarding starting in damp weather, you can try this. Spray all the ignition leads with WD40 and also the inside and outside of the distributor cap. You can also try this which worked for me on an old Datsun that didn't like damp weather. Get some broadsheet newspapers and tape them together to make one large cover for the engine compartment. Make is about 10 sheets thick. Run the vehicle with this all over the winter. When you drive the paper warms and keeps the leads warm. When you park, any moisture in the air goes into the paper and doesn't condense on the ignition system. Make sure the paper is away from moving part like the radiator fan and the exhaust manifold. Check it after your first short drive, it should stay in place.

Dec 02, 2015 | Ford Cars & Trucks

1 Answer

Raining for 3 days and my 2006 ford free star won't turn over. Battery is good, starter clicks no more. PCM has been wet before. Waiting for dryer weather and try again.


Rain should not affect your car starting. It sounds as if your battery is failing. Put your headlights on and get someone to turn the key with you looking at the headlights. If they dim to a glow-worm, your battery is not powerful enough. Sometimes a cell will fail and although your get 12 volts, you don't get enough cranking amps.

Regarding starting in damp weather, you can try this. Spray all the ignition leads with WD40 and also the inside and outside of the distributor cap. You can also try this which worked for me on an old Datsun that didn't like damp weather. Get some broadsheet newspapers and tape them together to make one large cover for the engine compartment. Make is about 10 sheets thick. Run the vehicle with this all over the winter. When you drive the paper warms and keeps the leads warm. When you park, any moisture in the air goes into the paper and doesn't condense on the ignition system. Make sure the paper is away from moving part like the radiator fan and the exhaust manifold. Check it after your first short drive, it should stay in place.

Dec 02, 2015 | Ford Cars & Trucks

1 Answer

2000 Lexus es 300 stalls when raining or damp


check power rely and ighition wireing system including coputer system

May 11, 2014 | 2000 Lexus ES 300

1 Answer

I have a 1995 chev caprice 4.3 ltr when it rains or damp out car wont start where should i look


The first place I would check would be the ignition coil. These are pretty bad for "arcing" in wet weather. Take a spray bottle full of water and spray the ignition coil with the engine running. If the coil is bad, you will probably see sparks at the coil and possibly the engine will die. If the coil is good, it should be able to take all of the water you can give it with a spray bottle.

Also, if this does not produce results, also spray the distributor cap and wires and look for the same thing.

Jan 19, 2012 | 1995 Chevrolet Caprice Classic

1 Answer

Engin turn but wont start after heavy rain


DUE TO DAMP WEATHER.BAD LEAKING SPARK PLUG WIRES WILL CAUSE STARTING PROBLEMS.OR SOME HOW IGNITIONS COMPONENTS IS GETTING WET.

Apr 19, 2010 | 2001 GMC Savana

1 Answer

The engine kills when it's wet outside (raining or just rained)


It is likely that your front oxygen sensor is getting wet.

Jun 18, 2009 | 2000 Pontiac Grand Prix

2 Answers

Astro vans that won't start if it's damp/raining outside


I have a 2000 Astro had the same troubles.I saw that the sides of the coil were burned looking.In between the bar that goes around it. This started around 110K It would run badly when wet or high humidity.Then throw up the check engine lite.Put on a new coil so far the problem has no reocured.

Feb 03, 2009 | 2000 Chevrolet Astro

1 Answer

Starting in damp weather 1993 240 wagon, auto/od, 235k miles


perhaps you need a new cap and roter a new spark plug wire set. they don;t like moisture. also check to see if you have any broken or leaking vacuum hoses. the worse case senerio would be that your head gasket is leaking--at cold temps a little antifreeze will enter until everything warms up and it seals shut due to metal expanding. but since you say it's cold weather only--this probably wou;dn't be the case. good luck.

Dec 27, 2008 | 1993 Volvo 240

1 Answer

Ignition problems during wet weather


Replace the distributor cap, rotor and ignition wires with Genuine Nissan Parts and you should be ok.

Sep 07, 2008 | 2000 Nissan Frontier

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