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#1
05-17-2010, 01:13 PM
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1989 420 SEL Breaking-Up & Not Starting when Hot
OK, a week ago upon acceleration under load semi-aggressive it started breaking up and had to feather. It continued and under light acceleration it would be ok, but if you turn on the a/c it would break up heavily, obviously I turned it off. Went to Bank came out car would not start but tried to almost like a dead battery.
Towed to shop, mechanic says new battery and works fine now that was the problem. NOT!! Same day i got it back from mechanic it started breaking up a little again. I took it home and did not drive for two days... Car started yesterday evening just fine, went to store, came out and had trouble starting so I went directly home, turned it off and tried immediate re-start... would not start.... Next morning started fine. So seems like when its hot it doesn't start, and that just running drains the battery system, and a/c makes it break-up (probably again takes to much power from battery system). Does this sounds like a coil issue? Fuel Relay/Pump....? Rotor/Cap/Plugs/Wires? FYI - The Problem was the Voltage Regulator on the Alternator - also 9/10 times its this and not the alternator itself... Help!! Lance - AKA "Skippy T" Last edited by SkippyT23; 05-20-2010 at 03:23 PM. 
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#2
05-17-2010, 02:17 PM
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check that your alternator is putting charge into battery.
__________________
David S Poole European Performance Dallas, TX 4696880422 "Fortune favors the prepared mind" 1987 Mercedes Benz 420SEL 1988 Mercedes Benz 300TE (With new evaporator) 2000 Mercedes Benz C280 http://www.w108.org/gallery/albums/A...1159.thumb.jpg
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#5
05-20-2010, 11:00 PM
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The voltage regulator is part of the alternator, so his assertion that the alternator was "putting out" was both incorrect and easily misconstrued
__________________
-tp 1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS 1988 560SEL "Gunther"- 190K passes anything except a gas station 1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition
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