84' 500SEC stalls when taking foot off gas after driving for short period of time - Mercedes-Benz Forum

 
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post #1 of 1 (permalink) Old 04-16-2011, 11:00 PM Thread Starter
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Date registered: Apr 2011
Vehicle: 1984 500SEC
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Unhappy 84' 500SEC stalls when taking foot off gas after driving for short period of time

I'm a new Mercedes owner and i just bought a 84 500sec. lately its been having some issues. Its oil pressure is very high, it misfires, and after driving for between 5 and 15 min it will begin to idle very low and start shaking pretty bad as i continue to make stops the RPMs drop to a point where my car stalls every time i take my foot off the gas when coming to a stop so i have to shift it into neutral and keep my foot on the gas to keep my car from dying this usually begins to happen after the engine temp hits 80 Celsius. No one seems to know why and i get different suggestions as what it could be such as the spark plugs (but they are new), the fuel pump, the idler, and timing belt but no real explanations so id like to know why b4 having to pay $150 for a diagnostic that may not even find the problem.
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