Yet Another Fuel Pump Problem

[Smooth Criminal]

I just replaced the fuel pump in my 1991 318IS, but the engine seems like he's not getting enough fuel

The engine starts, but looks like it's gonna stall and starts shaking unless I rev it up

Is it electrical or the engine's really not getting enough fuel? Can't be the relay or else it wouldn't start at all right?

[BMW Lover]

maybe the lines are clogged? :P

[Smooth Criminal]

The only part I replaced since the pump died is the fuel pump itself

Either the new pump is the problem

Or maybe when the old pump died, it caused electrical problems

What I need to know is: can the car start if the relay is not getting 12V? Cause the car is starting fine, it just doesn't seem to be getting enough electrical or fuel power to run

[detour54]

What else have you checked/replaced?

[Smooth Criminal]

I've only replaced the fuel pump, nothing else

[detour54]

Originally posted by Smooth Criminal@Sep 24 2004, 05:55 PM
I just replaced the fuel pump in my 1991 318IS, but the engine seems like he's not getting enough fuel

The engine starts, but looks like it's gonna stall and starts shaking unless I rev it up

Is it electrical or the engine's really not getting enough fuel? Can't be the relay or else it wouldn't start at all right?

[snapback]198413[/snapback]

I suggest you change your relay.

There's a good chance it could be the cause of your hard starting.

[Smooth Criminal]

I think I found the problem, the damn vacuum hoses! One of them had a little tear on one end, I patched it with duck tape until I can get some new vacuum hoses

Seems to be working ok now, hope that with all the pressure running in there the patched hose won't create any more problems...

[shield]

Replace your FUEL FILTER.

[Smooth Criminal]

That's ok, I'm pretty sure it's only the vacuum hose, I,m getting enough gas, I ran the car to work, the only problem is the idle when I start the car, after that it's fine

Thanks

[guywithblack88e30]

rough idle could be due to air flow my car would act like it would cut off when idle also check your intake boot for any holes and air flow sensor.

[Aether]

And there's the obvious idle control valve.
One of my pumps is about to be replaced (at least, I think there are two), and I'm curious. Did your car always act like it needed more fuel or was it just on startup?

[Smooth Criminal]

Thanks guywithblack88e30, I'll check out the intake boot and air flow sensor

And to answer Aether, my car acts weird only when I'm on neutral, once I'm geared it runs fine. But yeah, the idle when I start the car is somewhat worse than the idle once the car has been driven for a while