Question about 2001 BMW 330

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Bmw e46 330d i cant hear the priming diesel pump working when ignition is switched on

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Turned on only after the first turn the ignition key, he will not hear until when they does to start it , is quite a common problem diesel pumps

Posted on Dec 26, 2010

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Car has been sitting up and will not start now. It seems to not be getting gas and I do not know how to prime a fuel injection system. Any help appreciated.


There is only a few cars fitted with an ancient petrol injection system that needed any priming.

Diesel engines mostly need the injection system priming but petrol injection systems do not.

Lots of cars use a system where the fuel pump runs for a couple of seconds when the ignition is switched on and that is all the time it takes to prime the fuel system. After a couple of seconds the fuel pump switches off and waits to restart when the engine is cranked.

As priming the system takes only a couple of seconds some manufacturers don't bother with the brief priming run of the pump and just have the pump start when cranking.

Could be faulty supply, fuse, pump relay or the pump itself.
If the car is fitted with an immobiliser, perhaps that is the problem.

May 07, 2016 | 1998 Mercury Mystique

1 Answer

Bmw diesel wont start


I'm guessing that you got an air lock in your fuel system as a result of your changing the fuel filter... I certainly don't know about a BMW diesel, but in most semi-truck engines, there is a priming pump just for the purpose of getting the air out ... and the fuel into.... the fuel system. I've even been known to fill the filters with diesel fuel before screwing them onto the base.. This is risky because of the possibility of allowing some foreign, unfiltered debris to get into your pump and/or injectors, just because of your putting unfiltered fuel into your filter... Check and see if there is some kind of priming pump close to the filter. Also, a possibility is that you may have an electric fuel pump.... as to where all you may need to do is loosen a fuel fitting on the pressure side of the pump and filter.... and allow the electric pump to purge the system of air.. I confess to my lack of knowledge on your BMW.... but, I do have some basic understanding of most diesel systems... Good luck..

Jun 24, 2014 | 2004 BMW 320d

1 Answer

I Let my chevy Blazer run out of gas,nw it wont start even though the relay and fuelpump is working.


Is it electric or mechanical pump? Electric is with fuel injection. If its fuel injection, you should hear the pump run when you turn ignition switch. If u don't hear it, try starting, if no, turn off then on. It will self prime. Carburetor is with mechanical pump. I usually put few drops of gas in the carb. Start it, if no, more in carb till it stays running.

Jan 11, 2013 | 1999 Chevrolet Blazer

2 Answers

The engine is a 12ht turbo diesel 85 modle hj61 land cruiser. engine will start, the base idle is low and runs rough RPM aprox 600. wind up base idle with idle screw to 1000 runs good but u can take turn...


Check to see stop solenoid is working, you may be able to do this by getting someone to turn the key on and off slowly while you are hold your fingers against the side of it.
It is the small metal (Nut) with a wire going into it for an easy description.
The reason you have to choke the engine to stop it is you have either no power going to the switch or the switch is not working properly. i would think more that the switch may not be working properly as it is meant to close fully when power is turned off, if this was working it doesn't matter how much the motor is reving it will still shut of the fuel to the pump.
Sometime these solenoids get a bit of dirt etc stuck in them s well, this is usually just a easy fix,clamp the rubber fuel line before the pump, undo the switch, clean it and refit it, then undo the clamp and prime the pump using the hand primer.
Then start the vehicle, don't try to start the vehicle before you have reprimed the pump as you can damage the engine if you don't have fuel going into it.
Hope this helps, and good luck with it.
Dont rush working on a diesel, just take your time mate.

Jul 23, 2011 | 1989 Toyota Land Cruiser

2 Answers

No fuel up to injecter pump truck just stalled


Did you check for fuel pressure on the line from the tank while you had the filter off? Do you hear your fuel pump prime when you turn the ignition on? First I would listen for the hum of the fuel pump when you turn the key to the run position (not starting the engine) May have to get a helper and listen at the gas filler neck with the cap off. If you dont hear your fuel pump, check your fuses and relays. If the relay clicks when your helper turns the key on ( put your finger on the relay and ear down close to feel/hear the relay actuate)., and fuse is good, yet you do not hear the pump prime, I would say your fuel pump is shot.

If it is a diesel,check for fuel pressure coming off the direct drive pump hose while cranking the motor.

Mike

Jun 14, 2011 | 1994 Dodge Ram 3500

1 Answer

My bmw x5 diesel 2002 not starting when engine has run for 30 or more minutes, and also sometime it does not start in the morning the battery is nearly dead. i have realised that even if i took the...


Hi , this sounds like you have a couple of problems , firstly with the non starting after the engine has been running ,,, this is normally fuel pressure retension or the pre supply pump under the vehicle is faulty , the easiest way to check the pump, is when your vehicle doesn't start with the ignition lights still on , see if you can hear a buzzing noise from under the vehicle just behind the left hand front wheel , this will only prime itself for approx 20 seconds so it may be easier to have the help of someone , if you dont hear the buzzing turn the ignition off for 1 minute and switch on again , if there is no buzzing noise , replace the pre supply pump , the seccond fault with the blower motor running with the ignition off is a simple fault , this will require a replacment heater resistor , the resistor fails and drains the battery so it will cure the blower fault and the flat battery, hope this helps , regards mark

Jan 31, 2011 | 2005 BMW X5

1 Answer

Wont start unless manually primed


Turn the ignition key to the ON position without starting the engine

You should hear the fuel pump priming for about a few seconds then shutting itself off.
If not hear replace the engine oil pressure switch
The 3rd wire to that switch is the pumps prime switch lead.
When the engines oil pressure is reached the computer will shut that circuit off and turn on the fuel pump relay
If you hear the pump prime the relay maybe at fault instead

Jan 19, 2011 | Chevrolet 1500 Cars & Trucks

1 Answer

2001 BMW 530 DIESEL (E39)


LEAKS AT THE INJECTION PUMP CAN BE COMING FROM DIESEL INJECTION PUMP DRIVE GEAR INNER SEAL.LOOK FOR LEAKS AT FUEL SHUT OFF VALVE AND COLD START VALVE.

Jul 08, 2010 | 2001 BMW 5 Series

1 Answer

I cant find a priming pump


No pump. The only pump is the injection pump.

Dec 25, 2009 | 2000 Volkswagen Beetle

1 Answer

SENDING UNIT ???????


most of fuel pumps were in tank, wire corrodes is harness under right front seat floor pan to tank
if fuel pump buzz is heard and car runs and when it doesnt run you cant hear the fuel pump try
turn ignition off wait 10 seconds
turn ignition to on position to (prime or hear pump buzz)
no buzz fuel pump not working check fuel pump relay(swap with another) and try again?
you could use test light to pump wiring and make sure your getting power to pump on this prime test no power relay or wiring problem.
power at pump, but no buzz fuel pump faulty

Jul 01, 2009 | 1997 Isuzu Rodeo

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