I just bought a BMW 540i e39 that sat for 2 years.
While everything looks good electrically, including fuses, the engine cranks but it has not even sputtered once in numerous stating attempts, until the battery was almost dead.
I suspect it's fuel related, so I disconnected the fuel lead hose from the top of the fuel pump housing and cranked the engine - no fuel exited the tank through the barb fitting.
My question is, when the ignition switch is on or cranking, should a functioning fuel pump blow fuel through the top of the pump housing if the hose is disconnected?
Any insight you can provide is greatly appreciated as I look forward to driving this awesome car to no ends...
I checked the connection at the pump and I have power. Do you suggest I jump it anyways?
As you mentioned, when the ignition key in position #2, I should see fuel shoot from the barbed fitting on the top of the fuel pump housing, but there's nothing coming out from the fuel tank, and there were only a few drops of fuel in the line when I disconnected it when it should have been full of fuel since I tried starting it a few times before disconnecting the hose... right?
Hi Jim, I just did the same thing, hopeful the $30 pump made in China will help me get fuel in the motor...
It is with great joy and an amazing amount of gratitude I would like thank everyone who contributed to my beloved 1997 BMW 540i e39 coming back to life this evening shortly after I replaced the fuel pump with a $30 part I got from eBay.
It turns out the issue was the pump all along, as the old pump's protective screen shredded over time and small pieces of screen were sucked into the pump causing it to seize up, then fry the corresponding fuse.
After not running for over 2 years, I admit she's running a little rough, I plan on taking the fuel out and changing oil/fluids asap.
Is it just me or are 540i's the best cars ever built?