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Old 02-19-2002, 10:25 AM
Posts: n/a
fuel system

My fuel pump runs continuously. I don't know enough about the system to decide between the cold start valve, fuel distributor, or something I am not aware of where can I start looking?
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Old 02-19-2002, 10:32 AM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
If the car is running, so is the fuel pump. What is the problem?

And BTW what is the car?
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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Old 02-19-2002, 11:59 AM
Posts: n/a
300E, I was under the impression that if the pressure was up the pump would stop.
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Old 02-19-2002, 12:23 PM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
On this car & all MB's with electric pumps the pump is designed to run any & ALL of the time that the engine is running.

As Steve asked, "What is the problem"?
MERCEDES Benz Master Guild Technician (6 TIMES)
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44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
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190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
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Old 02-19-2002, 01:50 PM
Posts: n/a
My ignorance I suppose, the pump is noisy, I am not used to an MB making noise. I have replaced the pump, and still have the noise. The car will run faster than I want to drive it, so fuel volume is adequate. With 180k miles I start to wonder. Hence the concern.
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