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Wet Weather - Car Won't Start or Stalls 700

My '89 740 Turbo, 115K miles, has trouble starting up during very rainy days. Sometimes the engine does start up but stalls while driving... other times it won't start at all. I do hear the engine turning over, but it doesn't 'catch'. What I do in these situations is I keep on cracking the engine, sometimes for 15-20 minutes, until things seem to 'dry up' and I feel the engine starting to catch. From that point, it's usually another minute until I can get the engine to run stable. Well, at least for a few minutes - sometimes it stalls again later.

The battery is brand new. Full tune-up was done about 1 1/2 years or 15,000 miles ago.

This is definitely water related - I have no stalling and no-starting trouble in dry weather.

I have read through the FAQs, but am confused how to approach this. Also, someone recommened spraying WD40 or another water-repellant spray on certain parts of the ignition system. Does anyone know if this is true, and if yes, where do I spray this?

TIA!






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