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Old 09-02-2003, 10:27 AM   #1
MattJP
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Default mositure makes my car run bad...help!!

My 00 RS runs like crap if it sits in the rain or in humid conditions for a while. It sputters, misfires like its not firing on all cylinders until it gets warmed up. Anyone have any ideas on what I should do first??

Thanks in advance for any tips or suggestions...

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Old 09-02-2003, 11:03 AM   #2
Robin2
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when was the last time the spark plugs where changed? any CEL?

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Old 09-02-2003, 01:02 PM   #3
MattJP
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Its been awhile for a spark plug change...but it runs better after it warms up. If it were plugs/wires, would'nt it run like crap always???

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Old 09-02-2003, 01:22 PM   #4
ciper
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Actually I think Robin2 was very close.

Id be willing to bet your plug wires or coil pack is bad.

The moisture decreases the resistance significantly. Once the car warms up it all evaporates.

My first suggestion would be to let the car sit in the moisture and start it in the dark while watching under the hood, you may see the sparks!
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Old 09-02-2003, 03:40 PM   #5
Robin2
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Quote:
Originally posted by ciper
My first suggestion would be to let the car sit in the moisture and start it in the dark while watching under the hood, you may see the sparks!
True... could be one of the spark plug wires is done...

This night test is cool... I remember on my mazda, I'd see it arching off the distributor but it wasn't visible during the daylight....

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Old 09-02-2003, 06:18 PM   #6
DrD
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usually, erratic performance in damp conditions means you have a leak somewhere in the ignition system - moisture can get in and cause arcing - once the car warms up and the water burns off, everything is fine.

First thing I would do is check the plugs/wires/coilpack - pull the plugs and check the gap (that's not the problem, but you might as well check while you are in there), check the resistance of the plug wires (also, move them around/bend them a little while you are looking at the resistance - sometimes things are just fine when the wires are straight, but bending them increases the resistance due to a damaged core), then check the resistance of the coil pack and inspect for cracks - if everything is fine, reassemble, coating the inside of the plug wires (both ends), the outside of the plugs, and the connectors on the coil pack with dielectric grease - reassemble and you should be fine.
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Old 09-03-2003, 06:55 PM   #7
Keith99RS
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My car did the same thing early this summer when New England had their "really wet season". Almost identical symptoms. I replaced the plugs and wires and all is good. It is always worth a shot as the plugs (use NGK's listed in the owners manual) and OEM wires aren't all the expensive.
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Old 09-03-2003, 08:03 PM   #8
ciper
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Magnecor. NGK are okay but they are still a wear item. The magnecor dont wear out and if you get the 7.5mm they are about the same price.

Search around and you will find many of us use them.
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Old 09-04-2003, 10:33 AM   #9
MattJP
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Thumbs up Thanks!

Thank you all very much for the replies. I appreciate it.

Think I'll have a tune up...should the coil pack be replaced also??

Matt -
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Old 09-19-2003, 10:12 AM   #10
MattJP
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Well, new plugs and plug wires did the trick...

Nice from the start this morning driving in the hurricane rain.

Thanks for the input everyone!!

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