Help! Fuel Pressure

[euroe30]

Hi! Besides the pump and the pressure regulator, what eslse can cause bad fuel pressure?

[NC325iC]

leaks/bad lines

[backtrail69]

Clogged Fuel Filter

[jlevie]

Enough crud in the tank to plug the inlet screen, collapsed hoses, plugged filter.

[jht3]

clogged fuel tank vent/evap system

[euroe30]

thanks. I changed the fuel filter and disconnected the pressure regulator and replaced the pump. as soon as i rev it up, it drops a lot. its low at idle already. the lines dont leak. it only loses pressure when its warm

[jlevie]

That sounds like a weak high pressure pump or failure of the in-tank transfer pump.

[euroe30]

i dont have an in tank pump. its a euro spec 323i. i just bought a new fuel pump and am going to throw it in wednesday. we'll see how she runs