96 C280 fuel cut AGAIN

Tiny
NNAEMEKA OKEKE
  • MEMBER
  • 1996 MERCEDES BENZ
I'm still having the problem I asked earlier on. My 96 MB C280 about 102,000miles will usually stall at about a half tank and will not run unless you add about a gallon of gas to it. When you try to then fill up the tank, it only takes about 8 gallons and it fills up suggesting the tank was not empty bu at half tank like the guage said. Somebody complained about the same fault some time ago but I dont know if and how the fault was resolved.
any ideas?
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Thursday, August 9th, 2007 AT 4:54 AM

4 Replies

Tiny
BLOWFLY13
  • MEMBER
Hi had the same problem you need a new fuel pump
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Wednesday, November 7th, 2007 AT 3:52 PM
Tiny
NNAEMEKA OKEKE
  • MEMBER
Blowfly13,
thanks a lot for your post. I have been waiting for ages for a reply. Will try to change the pump and see if it will solve mine. Some mechanic told me I needed to change both fuel guage sensors but had to be sure somebody had tried that before. Thanks. :D
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Wednesday, November 7th, 2007 AT 8:04 PM
Tiny
BLOWFLY13
  • MEMBER
I spent over 3k the mechanics at merc changed the fuel senders then the tank, it was doing the same in my car it would run then stop about ten kms later I finally worked out the problem myself because the driveshaft goes through the lower half of the tank it has venturi pumps inside the tank which suck gas out of the two sides and pump it into a smaller holding tank (the smaller holding tank is built into the inside of the maintank ) this tank is where the fuel pump collects the gas, the fuel pump then pumps it to the motor then back down to the fuel tank were it pumps gas through the mechanical venturi pumps collecting more gas and dumping it in the holding tank,
merc mechanics will put a pressure tester on the fuel valve and tell you that the pressure is fine, but the problem is not the pressure it is the FLOW - there are only two ways to get fuel into the holding tank 1 ) by being pumped in with a correctly working fuel pump or
2) when you put gas in the car it goes into the holding tank and then overflows out to the main tank
Hope this helps (I was getting to the point of dam near burning the car in mercedes benz drive way. HAha)
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Wednesday, November 7th, 2007 AT 9:04 PM
Tiny
NNAEMEKA OKEKE
  • MEMBER
Thanks again. Will keep you posted
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Wednesday, November 7th, 2007 AT 9:13 PM

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