99 S-10 no start, damp weather?

Out of gap spark plugs or leaking plug boots positive spark is getting to ground stopping all plugs from firing properly or to large a gap in plugs I'm assuming that you mean the engine e is cranking but not turning over fast and persistent cranking finally starts it

Usually wet wires are issue when cold damp weather, so I would start there.

Good luck, FREE-PPV

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

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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 ...

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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 ...

You need to get some wire dry spray and spray all your wires and the ignition cap etc. You may have some bad wires or you cap has a crack.
Try the spray first see if it starts and runs.

Check all gas lines from your gas tank to the carburetor and see if there are damp spots and if you see any damp spots take your finger and wipe the damp spot and smell. If it smells like gas there probably is a slight leak. even a moist spot of gas will smell big time.
Check all around your gas tank as well. A question i have do you have a clean air filter. If not it might be choking itself to *****.

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

yes,

try test fuel, if not flooded,

starts then stalls?

If it is happening more frequently in cold or damp weather it could be a spark issue. Wet or damp weather can effect spark plug wires if there is even minor damage to them (usually occurs durring rain). The other things that come to mind are the fuel pump and lastly the fuel line check ball that is in the fuel tank. If it is leaking then all the fuel in the line will drain back into the tank over night (pressure lost in the fuel line) and this will cause repeated, extended cranking when you first start the car in the morning or after the car has sat for several hours.

I'd have a free scan at parts store for any trouble codes first , just in case, if no codes come up then I'd consider a new cap & wire set. One of , or the most common problem with hard start in wet/damp weather is plug wires & cap, especially if they haven't been changed that you know of since new.

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.

Replace the ignition coil under the distributor cap. What you have is a hairline crack in it, and, when it is damp, the spark arcs out of the crack to ground, no spark. This is a VERY common problem with older Camrys. Take the coil off, and look at it real closely. You will see black marks on it, from the crack. I am very sure that this will eliminate your problem. Thanks for choosing FixYa!