W203 Fuel Pump failing signs?
Thread Starter
Super Member
Joined: Mar 2015
Posts: 885
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From: PA
2019 E63s AMG
W203 Fuel Pump failing signs?
Hey guys,
2005 C240 4Matic has issues starting and idling. It has long cranks, but starts every time. New CPS, but it has a pump from autozone. While idle car shakes a lot like if is going to turn off, but when given some gas or driving it does not happen. I pressure tested the fuel system and took a video. Does it look like fuel pump failing?
2005 C240 4Matic has issues starting and idling. It has long cranks, but starts every time. New CPS, but it has a pump from autozone. While idle car shakes a lot like if is going to turn off, but when given some gas or driving it does not happen. I pressure tested the fuel system and took a video. Does it look like fuel pump failing?
Last edited by xEryx; Nov 19, 2018 at 03:43 PM.
Thread Starter
Super Member
Joined: Mar 2015
Posts: 885
Likes: 57
From: PA
2019 E63s AMG
MBWorld Fanatic!
Joined: May 2017
Posts: 2,290
Likes: 434
C320
My guess would be vacuum leak or bad MAF sensor. You need a scan tool with live data that can monitor the MAF sensor output as you rev the engine. You want to see a smooth linear increase in the map signal as the amount of air going into the engine increases.
