Fuel delivery Problem

Fuel delivery Problem was created by Toyman

Posted 3 weeks 2 days ago #210020
Australian MGF Mk2  2002.
After sitting idle on a trickle charger for 12 Mths, it will not start. Problem appears to be fuel related as it has no problem turning over.
Have searched the Internet and here with mixed results as to possible causes. Suspect the Fuel Pump is not operating as no priming heard.
Would like to eliminate everything associated as replacing the Fuel Pump is a job I'm not looking forward to.
Fresh Fuel / Fuse 14 OK There is mention of a fuse 23 but mine does not have one /  Inertia Fuel Cut Off Switch, working correctly / Fuel relay, mentions it is located rear panel behind carpet on a bracket with one or two other,I have nothing there apart from a fuse. So where is the relay located?
Any other suggestions greatly appreciated.
Cheers   John
by Toyman

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Replied by Roverlike on topic Fuel delivery Problem

Posted 3 weeks 2 days ago #210021

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Replied by Cobber on topic Fuel delivery Problem

Posted 3 weeks 2 days ago #210023
Where in Oz are you? Melbourne? if so I might be able to help, yes the fuel pumps on these thing can work intermittently, but first you need to check if it's getting current.

"Keep calm, relax, focus on the problem & PULL THE BLOODY TRIGGER"

by Cobber

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Replied by D4KGP on topic Fuel delivery Problem

Posted 3 weeks 2 days ago #210025
Hi I replaced the pump on one of these earlier in the year, it's not such a hard/difficult job as you might think.
But I checked that the old pump was not working before removing and replacing it with new that was purchased from ebay £65 or thereabouts. 12 months without use would have taken its toll on the pump being sat in old useless petrol. Good luck and its not hard to replace it. Glyn.
by D4KGP

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Replied by Cobber on topic Fuel delivery Problem

Posted 3 weeks 2 days ago #210026
If you do end up replacing the pump have a good look in the tank, to see if it's full of muck, you might have to clean out the tank like I did recently, if you have to remove the tank, there is a trick to it. But we shall worry about that if it needs to happen. I can giude you through it.

"Keep calm, relax, focus on the problem & PULL THE BLOODY TRIGGER"

by Cobber
The following user(s) said Thank You: Toyman

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Replied by Airportable on topic Fuel delivery Problem

Posted 3 weeks 2 days ago #210029
Slack back the union on the fuel filter & see if you have fuel there.
Go at it armed with rags around it, as it should run at high pressure & note, I said slack it, not undo it, as if it still functions, petrol will piss out in profusion.
M

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Replied by Cobber on topic Fuel delivery Problem

Posted 3 weeks 2 days ago #210030
Or if your in Melbourne I could perhaps bring my fuel injection system pressure test kit around a test it properly ans safely.

"Keep calm, relax, focus on the problem & PULL THE BLOODY TRIGGER"

by Cobber

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Replied by Toyman on topic Fuel delivery Problem

Posted 3 weeks 1 day ago #210038
Yes, several times.
Only relay mentioned for MGF Mk2 is the Engine Management Relay Module and as everything else it controls works I doubt it is that.
No mention of any fuses at all.
Relays located in the back panel only show on the MGTF section.
by Toyman

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Replied by Toyman on topic Fuel delivery Problem

Posted 3 weeks 1 day ago #210039
Unfortunately I'm in Perth. but thanks.
You don't happen to know where the Relay is located, or maybe it does not have one?
by Toyman

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Replied by Toyman on topic Fuel delivery Problem

Posted 3 weeks 1 day ago #210040
Yes, tried that. No fuel
by Toyman

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Replied by Cobber on topic Fuel delivery Problem

Posted 3 weeks 1 day ago #210041
The relay module you seek is hiding behind the bracket that supports the engine ECU in the engine bay on to LH side.
It's probably easier to diagnose the relay at the fuel tank unit, beside the engine cover (under the dead dog) there is another circular cover with 4 screws securing it. hiding under this is the tank unit, unplug the electrical connector and with your multimeter or test light put the + probe into the plug terminal with the White/Purple wire and the - probe to the terminal with the BLACK wire........if you have power all is probably well with the relay and earth header ( I say probably with no load under this test you may get a result but under full load a poor connection may fail )
Now if you get a poor result, you need to check the earth header  to do this take your - probe and earth it to the car's chassis and place your + probe to the terminal of the WHITE/PURPLE wire of the plug.......if you now get a good result you can suspect the earth header as your problem.
If you have power at the WHITE/PURPLE wire you should have power to the fuel pump.
The GREEN/BLACK wire is for the fuel gauge.
Now connect 12volts + to the terminal on the tank unit (where the WHITE/PURPLE wire would connect) and earth to the terminal (where the BLACK wire would connect) now see if it is pumping fuel....if not suspect the pump
As your car isn't a TF, don't waste time looking for that fuse 23 previously mentioned, it's only relevant to TFs

Now let's assume that you've decided the relay is OK and you suspect the pump itself.
You need to unplug the fuel lines and then remove the big collar nut that secures the fuel tank unit, once you start to withdraw the unit you will find the float unit for the gauge won't let it come all the way out, there are a couple of screws to remove securing the float assy to the tank unit to allow the tank unit to be fully removed from the tank.
Once out check the the 4 wires in side the tank unit, the RED wire is the pump +, it's companion BLACK wire is the Pump -.
The BLUE wire and it's companion BLACK wire are the for the gauge
Also check all the terminals in the tank unit are all OK and not broken or corroded.
If all that seems well, replace the pump!
 

"Keep calm, relax, focus on the problem & PULL THE BLOODY TRIGGER"

Last Edit:3 weeks 1 day ago by Cobber
Last edit: 3 weeks 1 day ago by Cobber.
The following user(s) said Thank You: David Aiketgate, Airportable, TA22GT

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Replied by Toyman on topic Fuel delivery Problem

Posted 3 weeks 1 day ago #210042
Thanks Cobber, most thorough response for me to follow through so will print out. Due to an upcoming trip in my Motorhome over East shortly it will now have to wait for my return next year.
I will post my response then, once again, thanks.
by Toyman

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