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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 09-24-2004, 05:55 PM   #1 (permalink)
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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?
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Old 09-24-2004, 08:57 PM   #2 (permalink)
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maybe the lines are clogged? :P
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Old 09-25-2004, 10:46 AM   #3 (permalink)
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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
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Old 09-25-2004, 03:57 PM   #4 (permalink)
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What else have you checked/replaced?
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Old 09-25-2004, 04:40 PM   #5 (permalink)
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I've only replaced the fuel pump, nothing else
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Old 09-25-2004, 06:24 PM   #6 (permalink)
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Quote:
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.
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Old 09-26-2004, 07:21 PM   #7 (permalink)
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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...
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Old 09-26-2004, 11:39 PM   #8 (permalink)
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Replace your FUEL FILTER.
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Old 09-28-2004, 02:13 PM   #9 (permalink)
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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
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Old 09-28-2004, 02:18 PM   #10 (permalink)
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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.
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Old 09-29-2004, 03:59 PM   #11 (permalink)
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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?
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Old 09-30-2004, 02:30 PM   #12 (permalink)
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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
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