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Author Topic: MK2 GTI 8v Digifant won't start. Fuel pump does not prime either (1990)  (Read 8807 times)

Offline alih85

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MK2 GTI 8v Digifant won't start. Fuel pump does not prime either (1990)
« on: 30 June 2009, 20:31 »
GTI has been standing for a few months, fitted a new starter motor as wasn't working, now it turns over but won't fire as no fuel coming through.

Fuel pump(s) do not prime, already replaced relay and fuse, tried a new lift pump today, nothing again.

Does anyone know if this has 2 fuel pumps? The lift pump on the top and the one underneath?

Can anyone help as i'm running out of ideas as to what is the problem?
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Offline Wayne

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Re: MK2 GTI 8v Digifant won't start. Fuel pump does not prime either (1990)
« Reply #1 on: 30 June 2009, 21:13 »
Yes 2 pumps a main one plus a small lift pump in the tank.
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Offline alih85

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Re: MK2 GTI 8v Digifant won't start. Fuel pump does not prime either (1990)
« Reply #2 on: 30 June 2009, 22:16 »
Thanks. I've just spotted the big pump underneath the car. I've just checked the wires going to the lift pump and there would appear to be no power there. There is to the sender alongside it but not the pump. I've replaced both the fuse and the relay though. Does anyone have an ideas? If there is no power coming through would this affect both pumps as neither make a sound!
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Offline mattneck(Beavis)

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Re: MK2 GTI 8v Digifant won't start. Fuel pump does not prime either (1990)
« Reply #3 on: 30 June 2009, 22:31 »
the loom runs from fusebox to liftpump and a trailing lead off of that goes to the main pump.. thats all i really know, personally.
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Offline Ben Lessani

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Re: MK2 GTI 8v Digifant won't start. Fuel pump does not prime either (1990)
« Reply #4 on: 03 July 2009, 08:27 »
Didn't Sidecarphil have something like this and it was his ECU that went pop.

Fire some easy start into the intake and see if it fires, at least see what does work
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Offline Wayne

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Re: MK2 GTI 8v Digifant won't start. Fuel pump does not prime either (1990)
« Reply #5 on: 03 July 2009, 09:57 »
If you have no power at the lift pump then the fault might be in the loom, trace the wiring back and see if you have power at the fusebox.
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Offline Diamond Hell

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Re: MK2 GTI 8v Digifant won't start. Fuel pump does not prime either (1990)
« Reply #6 on: 03 July 2009, 22:40 »
bear in mind that the pumps only prime for a moment when the ignition is turned on, so you need to have the meter on right then to check the volts at that point.

Do you have a peak hold function on the meter?
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Offline 78dutchy78

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Re: MK2 GTI 8v Digifant won't start. Fuel pump does not prime either (1990)
« Reply #7 on: 26 June 2011, 10:43 »
ignore mistake post :) new to the site
« Last Edit: 26 June 2011, 10:51 by 78dutchy78 »
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Offline 78dutchy78

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Re: MK2 GTI 8v Digifant won't start. Fuel pump does not prime either (1990)
« Reply #8 on: 26 June 2011, 10:45 »
Quote from: Diamond Hell on 03 July 2009, 22:40
bear in mind that the pumps only prime for a moment when the ignition is turned on, so you need to have the meter on right then to check the volts at that point.

Do you have a peak hold function on the meter?
 


Quote from: alih85 on 30 June 2009, 20:31
GTI has been standing for a few months, fitted a new starter motor as wasn't working, now it turns over but won't fire as no fuel coming through.

Fuel pump(s) do not prime, already replaced relay and fuse, tried a new lift pump today, nothing again.

Does anyone know if this has 2 fuel pumps? The lift pump on the top and the one underneath?

Can anyone help as i'm running out of ideas as to what is the problem?

mate im having the same problems! turn the key no fuel pump no nothing so bypassed it and fuel pump worked but still no fuel getting to the lines in the engine bay so checkd the relay n changed that as thought the lifter wasnt getting any feed along with the fuel pump still nothing car fires up fine on easy start but something i noticed was theres no fuel guage reading which tells me theres defo no feed getting to the fuel pump/ lifter im screwing about this as its a a project car n want it on the road if you could text me 07584678886 if you find out ur problem i would be very appreciative mate cheers









« Last Edit: 26 June 2011, 10:51 by 78dutchy78 »
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