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Old 07-09-2002, 01:48 PM
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1986 500 SEC - Possessed? Exorcist please!

I hope someone can help me with this! I posted and original thread about my 500 sec stalling intermittently, for no rime or reason, no special situation, cold or hot, doesn't matter! The most popular answer was the fuel pump relay, replaced it, now the entire fuel system is brand new, from the pumps to the injectors, it didn't fix it. But i noticed a querky thingin the past couple of days, it only happens when the a/c is running?!? I could drive all day with no problems unless i turn the a/c on, then it intermittently stalls, sometimes after 5 mins, sometimes after 1 hour, and for the life of me, i can't figure this out! If anyone has any suggestions, please HELP me! I would appreciate any help i can get!!! Oh, after about 30 seconds it will start right up, no problem, and the a/c is also intermittent, comes on when it feels like it!
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Old 07-09-2002, 01:49 PM
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Sorry, 1985, not 1986!!
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Old 07-09-2002, 07:16 PM
Join Date: Mar 2000
Posts: 37
Ok i had a 85 500SEL doing the same thing and it was the spark box that is by the coil mounted on the body(silver box) one other thing could cause this is a bad pick up coil in the disturbtor..

Good luck
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Old 07-10-2002, 08:24 AM
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Thanks, i'll check them out! I am also going to check the coil, this kind of thing happened to me in a plymouth barracuda i had, and it turned out to be a bad coil, but the electronics in that weren't quite as complicated as the MB!!

Thanks again.
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