1972 280sel - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 11-03-2008, 06:57 PM Thread Starter
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Vehicle: 280sel
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Post 1972 280sel

i got my car started finially every time i adjust the fuel pressure regulator and the computer to set to run and i will turn it off and then when i try to start it up after a few hours it sets itself back to running rich
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post #2 of 3 (permalink) Old 11-04-2008, 07:16 AM
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There's an "online respurces" portion of this forum. I posted a bunch of files on the fuel system for the V-8 engine. They include how to check for fuel delivery, emissions values, troubleshooting, and the like.

Once the pressure regulator is set, you shouldn't have to mess with it...
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post #3 of 3 (permalink) Old 11-04-2008, 12:27 PM
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The car sits and the coolant cools off, so the computer will richen the mixture, and gradually lean it as the engine warms up. What kind of CO readings are you getting when you start it? As I recall, 12% is not all that unusual for a cold start.

Chuck Taylor
Falls Church VA
1998 SL500
1959 220S
1970 280SL
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