How to test function of fuel pump on C32 AMG

Jul 6, 2020 | 09:21 PM

newfietunerc32

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Newbie

Joined: Jul 2015

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C32 AMG

How to test function of fuel pump on C32 AMG

Hello! I am at my wits end with this car and I am in desperate need for some help! I installed a new fuel sending unit AND fuel pump (both sides of the tank) last summer and the car ran but this year she won't start. There is NO fuel pressure at the rail, thought maybe the fuel filter was badly clogged but when I unhooked the fuel lines and went to start, ZERO fuel was coming out of the lines. I feel the relay clicking and now I want to check and see if I have a power issue to the pumps. Any help would be GLADLY received! Please make my beast come alive again! TIA

Jul 6, 2020 | 11:50 PM

godpossessed

Junior Member

Joined: Mar 2018

Posts: 74

Likes: 7

2002 C32

You gotta get this diagnosed by a tech with the right test equipment. It will likely be a problem in the rear SAM. Bad fuel pumps pull a lot current and that can melt stuff and cause havoc.

Jul 7, 2020 | 06:19 AM

newfietunerc32

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Joined: Jul 2015

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C32 AMG

Quote:

Originally Posted by godpossessed

You gotta get this diagnosed by a tech with the right test equipment. It will likely be a problem in the rear SAM. Bad fuel pumps pull a lot current and that can melt stuff and cause havoc.

New rear SAM also!

Aug 10, 2020 | 07:10 PM

APowerX

Junior Member

Joined: Apr 2013

Posts: 38

Likes: 1

From: Belgium

C32 ///AMG, C200 CDI

Check if the connection in the tank hasn't come off. also check if you get 12v on the pump during cranking. The quick-connector in the tank is usually the culprit if it's been disconnected a few times.