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F.I. problems when it rains 700 1990

posted by  someone claiming to be Robert on  Fri Dec 8 12:12 CST 2000 [RELATED]

This has been occuring for about a year. My normally strong running 8 valve, non turbo 740 develops a miss problem if it rains the night before I drive it. Now it is occuring after a trip to the do it yourself car wash.It always clears up after 30 minutes or so of in town driving.

I pulled the injectors one at a time recently while idling with the miss & found that #4 when pulled, did not affect the engine. I thought it was dirty & ran techron for 3 tanks of 89 octane. Next rain it came back, but this time it was #2. I think I've got a intermittent short to ground when humidity is 100%. To make matters worse, I live in Seattle.

Should I pop the hood and start misting with a spray bottle everything electrical until the miss develops, then consentrate on that component, or is there something else I should try?

Please don't tell me to Arizona.

Car recently had 50K service. Has lots of new stuff, but nothing in way of F.I....





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