Fuelpump not running??
Thread Starter
Super Member
Joined: Feb 2008
Posts: 844
Likes: 1
From: Orland Park, Illinois
1994 E320 (current)
Fuelpump not running??
So the fuel pump will run when I jump power to it directly from a 12 volt battery but will not kick on when I send power to it from the 87 and 30 pin receptacle at the relay port. Any thoughts on how to ID what is going on? The Fuel pump is verified to be good. The problem started with a loss of fuel pump after 20 minutes of running. It then became intermittent but the gap closed to now it won't kick on at all.
Junior Member
Joined: Mar 2011
Posts: 21
Likes: 0
From: Sweden
E200 W124
So the fuel pump will run when I jump power to it directly from a 12 volt battery but will not kick on when I send power to it from the 87 and 30 pin receptacle at the relay port. Any thoughts on how to ID what is going on? The Fuel pump is verified to be good. The problem started with a loss of fuel pump after 20 minutes of running. It then became intermittent but the gap closed to now it won't kick on at all.
Member
Joined: Dec 2008
Posts: 200
Likes: 1
From: Connecticut
1991 300CE
Have a quick look at the wiring diagrams (http://www.w124performance.com/servi...am/ETM/ETM.pdf). I believe between the battery and fuel pump(s) is the MAS/ECU, which says those perhaps are becoming problematic. Also, another quick check is to pull the rear seat bottom to ensure wiring to FP is fully intact.
Last edited by CTE55AMG; Jun 17, 2011 at 10:04 AM.
Thread Starter
Super Member
Joined: Feb 2008
Posts: 844
Likes: 1
From: Orland Park, Illinois
1994 E320 (current)
Have a quick look at the wiring diagrams (http://www.w124performance.com/servi...am/ETM/ETM.pdf). I believe between the battery and fuel pump(s) is the MAS/ECU, which says those perhaps are becoming problematic. Also, another quick check is to pull the rear seat bottom to ensure wiring to FP is fully intact.
