fuel gauge
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Joined: Feb 2019
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2002 c-240
fuel gauge
have alreay replaced drivers side sending unit and still same problems returns, when i fill tank fuel gauge will work ok but hangs up at half way line until fuel is exhausted,in other words half to empty gauge has no reading at all until out of gas,
so is this a common problem with this car
so is this a common problem with this car
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C320
MBWorld Fanatic!
Joined: May 2017
Posts: 2,290
Likes: 434
C320
Member
Joined: Aug 2018
Posts: 132
Likes: 6
From: Lawrence, KS
2003 MB C240. 2004 ML500, 2005 F150
Guess I should have asked how the home mechanic can tell which is bad. I don't have a MB scan gauge. Should be a resistance value or something I can go by though, right?
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Joined: May 2017
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C320
This is for the 211/219 but the saddle tank setup on the 203 is the same as this.
https://www.ms-motorservice.com/en/t...-tank-modules/
Each side of the tank has its own float and sensor. The fuel return is used to siphon fuel from the driver's side to the passenger side so the pump is never starved of fuel.
sorry I don't know the pin outs or resistance values to look for.
https://www.ms-motorservice.com/en/t...-tank-modules/
Each side of the tank has its own float and sensor. The fuel return is used to siphon fuel from the driver's side to the passenger side so the pump is never starved of fuel.
sorry I don't know the pin outs or resistance values to look for.
Last edited by tjts1; Feb 11, 2019 at 02:20 PM.
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Member
Joined: Aug 2018
Posts: 132
Likes: 6
From: Lawrence, KS
2003 MB C240. 2004 ML500, 2005 F150
Good info, thanks tjts1. I'm probably going to pull both sides and look for anything "weird". I'm hoping maybe there are some contacts that can be cleaned or something otherwise. Either way, I'll video it and throw it up on youtube.
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From: So. Oregon Coast
C230 Sport Coup + 2006 W164 ML350 + 99 Ford Escort RIP
There is the possibility that someone replaced the pump, and failed to connect everything correctly, perhaps?
Autozone has a pump tool to loan as well as pressure tester.
Autozone has a pump tool to loan as well as pressure tester.
Member
Joined: Aug 2018
Posts: 132
Likes: 6
From: Lawrence, KS
2003 MB C240. 2004 ML500, 2005 F150
I pressure tested my pump and it was right at 55-57 psi. The only issue is the level. I don't think its correct. My tank showed 1/4 left when the guy sold it to me. I put a couple gallons in and it fired up after I primed the pump. Seems its reporting incorrectly or a pickup tube on the pump became disconnected or something.
