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Join Date: Mar 2007
Location: Chicago, IL
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help please...car acting weird when it rains

i just bought my 944 yesterday and as i was driving the car back from ohio(i live in chicago), it started to rain, and then the rpms just started dropping and if i gave the car gas it wouldnt respond, so i pulled over and me and my friend took a look at it

keep in mind this car only has 40k miles on it and it is very clean and was well taken care of

there was some water by the distributor, my friend thinks some moisture possibly got in by the wires and distributor cap and was messin things up

it stopped doin it and i drove for about 5 minutes and then it did it again, but this time the car wouldnt start, we waited like 5 minutes and it started again and didnt have a problem after that because we were out of the rain, also it was running fine later that night and also was fine today(no rain) and before we got to the rain there was no problems

does anybody know if this is a common problem???

do you guys think replacing the wires or distributor cap would help?

thanks
Old 03-25-2007, 11:24 AM
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I would replace the rotor, cap and wires. It's quite possible that on a 40k mile car (the newest of which would be 15 yrs old or more right now) that the insulation is dryrotted and letting moisture in.
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Old 03-25-2007, 11:43 AM
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Check to see if you have any moisture by the DME as well......
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Old 03-25-2007, 12:22 PM
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I absolutely had a problem like this everytime it rained with my 911. It went away when I replaced the wires which were very old and had cracks in them - car ran fine when dry. I am almost sure your problem is electrical.
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Old 03-25-2007, 12:28 PM
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I think also that you need to change the distributor cap, the rotor and the wires. I had trouble with my ignition all the time when the temperature was rainy.
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Old 03-25-2007, 12:31 PM
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Definitely, definitely, definitely check the DME for water. You do NOT want moisture in there. What year car is it? The early cars had the DME under the driver's dash, the later cars and Turbos had the DME in the pass. side footwell.

Replace the cap, rotor, and dist., as well, but this should be done whenever you buy an old sports car anyhow (unless a full tune-up was documented recently).
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Old 03-25-2007, 12:49 PM
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its a 89 944 N/A

thanks for all the advice guys

ill probly end up replacing the wires/distributor soon, actually ill have my friends do it cuz their mechanics and i dont really know **** and id probly make things worse lol

what brands do you guys recommend for these parts?

thanks

Last edited by whitesox23; 03-25-2007 at 01:25 PM..
Old 03-25-2007, 01:09 PM
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Quote:
Originally posted by whitesox23


ill probly end up replacing the wires/distributor soon, actually ill have my friends do it cuz their mechanics and i dont really know **** and id probly make things worse lol

I have a couple pointers here. First off, you should be able to do this kind of thing yourself; it is routine maintenance, very easy, and you'd be throwing money away if you paid a mechanic. If you have your friends do it, I recommend making your friend give you a "lesson". These kinds of maintenance issues are much easier than most people think.

Pick up the Haynes manual, or better yet, check out clarksgarage.com.
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Old 03-25-2007, 01:53 PM
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Unless you have a very large bank account, you will become quite the mechanic in a year or so.

Ask me how I know.
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Old 03-25-2007, 01:58 PM
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hi my son had the exact same problem, if u find no problems in the areas mentioned try: Disconnect the wire from the TPS and if the car runs fine(other than high idle at rest) i would test and change the TPS this was the problem with my sons runs great now working on other problems.
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Old 03-25-2007, 02:14 PM
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thanks for the info, im planning on picking up a haynes manual tomorrow and ill check out clarksgarage
Old 03-25-2007, 02:30 PM
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Check for a very loose spark plug.
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Old 03-25-2007, 02:53 PM
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we checked the plugs and they were fine
Old 03-25-2007, 02:57 PM
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There is supposed to be a plastic baffel between the dist cap and the housing as well as a gasket. This is to keep the water out of the dist cap that the belts kick up.

Replace with stock items. You can just replace the cable between the connectors on the spark plugs. www.kingsborne.com
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Old 03-25-2007, 04:14 PM
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