Fuel Pump Dead?
Thread Starter
Member
Joined: Sep 2006
Posts: 228
Likes: 42
From: North of San Francisco
14 E550, 07 E550, 69 Mach I, 65 Hipo, 66 Fairlane GTA Conv, 66 Fairlane GT
Fuel Pump Dead?
Car died while driving.
Tank half full.
No fuel in rail.
Fuse good.
Bypassed relay to get 12v at the fuel pump connector under the left passenger seat. Still no start (and no noise from pump). Sounds like the pump is bad.
But when I put an ohm meter on the leads to the fuel pump expecting no ohms (open circuit) I get 480 ohms (using two different meters).
Is it still the pump or does MB have some other circuit to test?
Tank half full.
No fuel in rail.
Fuse good.
Bypassed relay to get 12v at the fuel pump connector under the left passenger seat. Still no start (and no noise from pump). Sounds like the pump is bad.
But when I put an ohm meter on the leads to the fuel pump expecting no ohms (open circuit) I get 480 ohms (using two different meters).
Is it still the pump or does MB have some other circuit to test?
MBWorld Fanatic!
Joined: Jan 2014
Posts: 3,969
Likes: 1,317
From: Republic of Texas
'99 and '05 E55 AMG
Thread Starter
Member
Joined: Sep 2006
Posts: 228
Likes: 42
From: North of San Francisco
14 E550, 07 E550, 69 Mach I, 65 Hipo, 66 Fairlane GTA Conv, 66 Fairlane GT
Replaced the fuel pump (easy job) and car fired right up. Pelican write-up was very helpful. Problem solved! However, a week later, it’s now taking 4-5 seconds of cranking to start like the fuel pressure is bleeding down. Any thoughts??
MBWorld Fanatic!
Joined: Jan 2014
Posts: 3,969
Likes: 1,317
From: Republic of Texas
'99 and '05 E55 AMG
Hook up a "fuel pressure gauge tester", run the gauge to the windshield and tape it there or have it where you can see it in the engine compartment (but not fall into the rotating components!). Monitor the gauge at key on and when cranking. This will confirm proper/improper operation of the fuel pressurization sequence.
Junior Member
Joined: Sep 2020
Posts: 22
Likes: 0
2003 e320
These are the parts I ordered and installed.
Fuel Pump: Herko Automotive: Manufacturer Part Number: 263GE (OE replacement for - E8530M 2114701494 67972 A2114702994 P3227) - bought on Amazon
Sending Unit: Mercedes-Benz Fuel Pump Assembly with Fuel Level Sending Unit - (Transfer Pump) - Continental VDO 228-242-010-006Z - purchased from Pelican Parts
Fuel Pump: Herko Automotive: Manufacturer Part Number: 263GE (OE replacement for - E8530M 2114701494 67972 A2114702994 P3227) - bought on Amazon
Sending Unit: Mercedes-Benz Fuel Pump Assembly with Fuel Level Sending Unit - (Transfer Pump) - Continental VDO 228-242-010-006Z - purchased from Pelican Parts
Newbie
Joined: Jun 2018
Posts: 1
Likes: 0
From: EVERETT,WASHINGTON
2000 S500 W220
In need of advice please
Hook up a "fuel pressure gauge tester", run the gauge to the windshield and tape it there or have it where you can see it in the engine compartment (but not fall into the rotating components!). Monitor the gauge at key on and when cranking. This will confirm proper/improper operation of the fuel pressurization sequence.
