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BMW 3-Series (E90 E92) Forum
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Fuel Pump or Possible Water in the Gas Tank?
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10-04-2011, 10:34 PM | #1 |
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Fuel Pump or Possible Water in the Gas Tank?
Hello everyone. Long time lurker for 5+ years. I've got a 2007 328i with 63k that has lately been having some type of fuel problem. It first started after the car was parked at the airport for 4 days. I came back to my car and hit the start button and the car would crank and would not start. I first thought it was a battery issue but then realized it almost felt like I was out of fuel. I had a quarter tank and so continued to try and start the car. To get it to start it required me to get on the throttle almost like the engine had no gas in it while it was cranking. After the car is running for a while it starts fine. Over the last week it seems to only have problems when the car has sat for about 6-10 hours. I know its fuel related but I wasn't sure if the filter was clogged or perhaps the fuel pump is on its way out. I know the 335i have had lots of problem with the HPFP but to the best of my knowledge this car does not contain one and doesn't seem to have any issues with fuel pumps going bad.
I had a friend recommend checking to see if the gas tank may contain some water in it. He thinks it would makes sense because overnight while the car sits all the water would settle in the bottom of the tank since it is heavier. Since the original problem I've filled the car up to 3/4 full with premium shell fuel and continue to have problems after letting the car sit overnight. Sometime I get errors messages and check engine lights, sometimes I don't. The car has gone into limp mode twice some mornings after the car probably get a slew of error codes that it has no idea how to handle. Does anyone have any clue about what this could be? |
10-04-2011, 11:35 PM | #2 |
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Here is a video of my car starting this morning. I felt like this was a decent start compared to other mornings. The car starts but has problems idling and then ends up stalling by itself. The next time I give it gas and then everything is fine with no errors or check engine lights afterwards.
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10-04-2011, 11:38 PM | #3 |
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coil packs?
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10-05-2011, 12:17 AM | #4 |
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I don't think is water in your gas tank. Engine light will be on with mis-fired and shaking if that's the case. Since u where able to drive your car back from airport & able to tell your friend about it I suspect otherwise. Buy dry gas from auto zone if u want to make sure.
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05-08-2024, 04:46 AM | #6 |
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hello my bmw is leaking water into the fuel reservoir. i have a clogged sunroof and the rear right wheel liner broke and im waiting for a replacement. i took the car to the dealership and they couldnt find a leak anywhere and said im buying gas that has water in it but i always get gas from that station and use it for my other car and it runs fine the bmw starts to leak water whenever i rains or whenever i wash it any ideas?
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05-08-2024, 06:11 AM | #7 |
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Wow. 13 years
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05-08-2024, 10:55 AM | #8 |
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What "fuel reservoir" are you referencing? The Fuel Tank is sealed, and even if there were water collecting at the filler cap opening, it would NOT get into the tank (assuming the Filler Cap is installed), at least on US vehicles.
Questions: 1) Last-7 Characters of VIN? 2) Photo of "water in fuel reservoir" or wherever water is accumulating from "leak"? 3) Warning Lights on Instrument Cluster? 4) Fault Codes in DME (Engine Control Module) Fault Memory? 5) Engine performance issues? Your initial post contains NO clues about any engine issue associated with "Water in Gas". ONLY a gratuitous statement from "Dealer" about water in gas. Did "Dealer" actually FIND water in gas? Did "Dealer" offer any suggestion of HOW water could get into gas tank? Can you attach Scan of "Dealer" Invoice? US E9x vehicles have "DMTL" (Diagnostic Module for Tank Leakage) that tests after each engine shutdown for any leak of tank vapor into atmosphere. If there IS a leak (such as filler cap gasket leak), a Fault Code would be saved in DME Fault Memory. We do NOT know HOW your vehicle is equipped, but unless your vehicle has STRONG fuel odor, either inside, or near filler cap area, it is unlikely the tank leaks or admits water from ANY source, such as roof drain. George |
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fuel filter, fuel pump, water gas |
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