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Author Topic: Is the diesel pump failing?  (Read 2615 times)

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Glassback

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Is the diesel pump failing?
« on: 06 December 2009, 14:07:24 »

I am having trouble starting when the car has been left standing overnight. I have changed the crossover injector seals and the leak off pipes but I an still having trouble. The car is a facelift 2001 2.2 tdi cdx. I am wondering if the pump is failing, is there any way of testing it without having to re mortgage the house to pay the VX main stealer.  :'(
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rob in gib

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Re: Is the diesel pump failing?
« Reply #1 on: 06 December 2009, 14:19:47 »

check or change the glow plugs hth
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damage consultant

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Re: Is the diesel pump failing?
« Reply #2 on: 06 December 2009, 14:35:48 »

turn ignition on and listen at the fuel tank you should here fuel dribbling back to the tank.
you have to be quick it shuts off after 5 secs
don't start the engine or you won't here anything.
i'd put money on the glow plugs if the main pump die's its all stop you won't get any warning
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MickAP

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Re: Is the diesel pump failing?
« Reply #3 on: 06 December 2009, 15:22:37 »

I have a TD and had same problem as you. First check the glow-plugs, if they been on the car for approaching 100k then they will be getting tired.
Does it start ok when warm? If so then change glow-plugs first, cheap and easier to do on the DTi, so I'm told.

Mick
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Glassback

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Re: Is the diesel pump failing?
« Reply #4 on: 06 December 2009, 20:13:45 »

Quote
turn ignition on and listen at the fuel tank you should here fuel dribbling back to the tank.
you have to be quick it shuts off after 5 secs
don't start the engine or you won't here anything.
i'd put money on the glow plugs if the main pump die's its all stop you won't get any warning


If I dont hear fuel dribbling back to the tank, does it mean the pump has thrown the towel in?
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Elite Pete

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Re: Is the diesel pump failing?
« Reply #5 on: 06 December 2009, 20:55:00 »

Quote
Quote
turn ignition on and listen at the fuel tank you should here fuel dribbling back to the tank.
you have to be quick it shuts off after 5 secs
don't start the engine or you won't here anything.
i'd put money on the glow plugs if the main pump die's its all stop you won't get any warning


If I dont hear fuel dribbling back to the tank, does it mean the pump has thrown the towel in?
I think the 2.2DTi id different, it only has the injector pump and not a seperate fuel pump like the 2.5TD. Have you checked the fuel filter and housing?
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damage consultant

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Re: Is the diesel pump failing?
« Reply #6 on: 06 December 2009, 21:01:49 »

I'm not to sure i know the 2.5td has 2 pumps one in tank other injector.
there might be a third pump under or around drivers seat area(under the car).
i once had a fault like this in a pug 406.
p.m the boy
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Glassback

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Re: Is the diesel pump failing?
« Reply #7 on: 07 December 2009, 12:24:19 »

Quote
Quote
Quote
turn ignition on and listen at the fuel tank you should here fuel dribbling back to the tank.
you have to be quick it shuts off after 5 secs
don't start the engine or you won't here anything.
i'd put money on the glow plugs if the main pump die's its all stop you won't get any warning


If I dont hear fuel dribbling back to the tank, does it mean the pump has thrown the towel in?
I think the 2.2DTi id different, it only has the injector pump and not a seperate fuel pump like the 2.5TD. Have you checked the fuel filter and housing?

I have replaced the fuel filter and housing, and I have just had a quick test on the glow plugs, I dont think there is any power to them but is is hard to tell on my own. Could there be a fault on the glow plug relay? if so where is the relay located?
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Elite Pete

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Re: Is the diesel pump failing?
« Reply #8 on: 07 December 2009, 12:57:59 »

The glow plugs on a TDi don't come on until the temperature drops to a certain level but can't remember what it is.
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Glassback

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Re: Is the diesel pump failing?
« Reply #9 on: 08 December 2009, 21:33:19 »

Quote
Quote
Quote
turn ignition on and listen at the fuel tank you should here fuel dribbling back to the tank.
you have to be quick it shuts off after 5 secs
don't start the engine or you won't here anything.
i'd put money on the glow plugs if the main pump die's its all stop you won't get any warning


If I dont hear fuel dribbling back to the tank, does it mean the pump has thrown the towel in?
I think the 2.2DTi id different, it only has the injector pump and not a seperate fuel pump like the 2.5TD. Have you checked the fuel filter and housing?

Just been to my VX main stealers, he says there is no pump in the tank. Tried starting the car yesterday morning, it fired up ok. but only ran for a few seconds then I had to crank it till the battery nearly went flat before it started again. Is this a symptom of failing glow plugs? It was parked on level ground btw. So last night I parked it on the drive facing down hill, and this morning it fired up and ran ok. I am thinking there could be air getting in the fuel line somewhere, I have had a good look but found nothing. Tonight I shall park on level ground, just to see if it fires and runs ok in the morning.
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Elite Pete

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Re: Is the diesel pump failing?
« Reply #10 on: 08 December 2009, 22:48:55 »

I would say there is an air leak.
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Glassback

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Re: Is the diesel pump failing?
« Reply #11 on: 09 December 2009, 13:01:34 »

Quote
Quote
Quote
Quote
turn ignition on and listen at the fuel tank you should here fuel dribbling back to the tank.
you have to be quick it shuts off after 5 secs
don't start the engine or you won't here anything.
i'd put money on the glow plugs if the main pump die's its all stop you won't get any warning


If I dont hear fuel dribbling back to the tank, does it mean the pump has thrown the towel in?
I think the 2.2DTi id different, it only has the injector pump and not a seperate fuel pump like the 2.5TD. Have you checked the fuel filter and housing?

Just been to my VX main stealers, he says there is no pump in the tank. Tried starting the car yesterday morning, it fired up ok. but only ran for a few seconds then I had to crank it till the battery nearly went flat before it started again. Is this a symptom of failing glow plugs? It was parked on level ground btw. So last night I parked it on the drive facing down hill, and this morning it fired up and ran ok. I am thinking there could be air getting in the fuel line somewhere, I have had a good look but found nothing. Tonight I shall park on level ground, just to see if it fires and runs ok in the morning.


After being parked on level ground last night, it would not start this morning. There is one of those in line primer bulbs on it. I dont know if the previous owner put it on or if it is standard. So I tried to pump some fuel through but I am getting nothing, the gauge is showing plenty but it could be wrong, it seems as though the tank is empty or there is a blockage. I am really Pi$$ed off with it now. Almost at the point of putting a hammer through it
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Elite Pete

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Re: Is the diesel pump failing?
« Reply #12 on: 09 December 2009, 13:32:57 »

The priming bulb pump thingy should have a one way valve fitted so if you disconnect the end of the bulb closest to the injector pump and give it a squeeze you should get diesel from it.
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Psychoca

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Re: Is the diesel pump failing?
« Reply #13 on: 09 December 2009, 14:40:27 »

If the glow plug circuit is anything like my old 2.0 DI Vectra, then it doesn't kick in until around negative temparatures...
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Glassback

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Re: Is the diesel pump failing?
« Reply #14 on: 09 December 2009, 20:41:17 »

Quote
The priming bulb pump thingy should have a one way valve fitted so if you disconnect the end of the bulb closest to the injector pump and give it a squeeze you should get diesel from it.

I disconnected the primer bulb and was squeezing till my arm dropped off, but got nothing. The gauge was showing just below a quarter full, not quite in the red, I can some times run it for a day when the warning  light comes on, but as I say it was not on. So I shoved another gallon of fuel in and did some more pumping. Finally got some fuel through but is was Black, so maybe that's where the trouble is. Looks like tank off time. And I shall have to have a look at the sender gauge as well, are they repairable / expensive? :'(   
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