GQ/Maverick - TB42 electric fuel pump issues.

[Mark01]

Just purchased myself a new (old) rig.

Ford Maverick SWB.
Petrol and Gas, TB42.

63014

The previous owner has put in an electric fuel pump as the mechanical one died apparently.
I can't seem to get it to work however. Ive managed to get it to idle but as soon as i start to drive her
she dies after like 10 meters.

I thought maybe the one fuel pump wasnt strong enough so i added another and have had the same result.

Really lost as to what to do next.

I doubt the thing has run on petrol for a while so im thinking the carby could have some issues?

Is there anyway i can adjust the float ?

Any help would be greatly appreciated.

Cheers, Mark.

[taslucas]

Is there fuel visible in the filter when it dies? If so then I'd say the pump is pushing enough.
It's very common for the carbies on these to get a bit sick as they get older and definitely if they've been on gas for any amount of time. Running solely on gas dries out the carby. There are a lot of threads on this subject if you have a little search.
First off though I'd go around the carby with some crc/wd40 etc and make sure all the linkages, springs etc are lubed up and visually check for any missing vacuum lines etc.

tappin from tassie

[taslucas]

Also, these carbies can be temperamental so er on the side of caution before jumping in and adjusting things

tappin from tassie

[Mark01]

I've soaked it in some carby cleaner but no real luck. How much fuel do they need to run cause I've pulled the hose off the carby with the fuel pumps and it's nothing extreme just a steady small stream.

[taslucas]

Not sure of the flow rate but I'd say an electric one should have enough flow.

tappin from tassie

[Mark01]

How would i go about changing or checking the float level?

[GQ TANK]

Sounds like a partially blocked petrol filter.

Is there a Silver canister near your battery with 2 hoses - try by passing it and see if it makes a difference.

There is also a gauze filter where the fuel enters the carby

[Mark01]

I've bipassed the fuel filter in the engine bay and she seems to be running better.
Let some wd40 soak over the whole carby overnight and now she runs and drives but cuts out up hills and at higher speeds I think

[GQ TANK]

The RB30's are know for running out of fuel on very steep hills while 4wding - I used to run my MK on LPG a little less power but no loss of power.


I have had no issues with the TB42 and the carbys are basically the same

Don't run without the filter for too long as you could end up with a clogged carby

[Irish]

The dual fuel setup can be hard on the TB42's carby, because the gas runs hot and dry it cooks em over time, might be worth putting a rebuild kit through it.

What kind of electric fuel pump is it, is it the standard Nissan in-tank one or is it an external type

Does it still cut out on hills when you are running it on gas or just on petrol?

[Irish]

Any joy mate?

[Mark01]

managed to finally get her going.
bought a aeroflow blue electric fuel pump (copy of the holley blue) and she seems to be working well so far.
shes just in need of a good tune now.

thanks for the help and tips.

[taslucas]

Good stuff mate. Hopefully she'll be roosting tyres in no time!

tappin from tassie

[Mark01]

Now carby leaks out the top. Can't win with this thing lol.

[dom14]

Now carby leaks out the top. Can't win with this thing lol.

You might have just bandaided the real issue. It's possible there's too much fuel pressure now or the carby might need a rebuild anyway.
Get a rebuild kit off ebay and follow some of my earlier threads about the RB30 carby rebuild or
get the carby professionally rebuilt. You can also get a brand new carby for around $400 from ebay.
Replace the fuel filter if you haven't done that already. Get a fuel pressure/vacuum tester and test the fuel pressure.
Also test the fuel return switch/valve as well. Patrol manual(Haynes) can guide you how to do the fuel pressure/fuel return switch, etc tests. Download the manual from this forum.

http://www.ebay.com.au/itm/CARBURETTOR-CARBY-REPAIR-SUIT-NISSAN-PATROL-GQ-Y60-TB42-4-2L-RB30-FORD-MAVERICK-/191561351672?hash=item2c99f241f8:g:vF4AAOSwBahVMd~ T


http://www.ebay.com.au/itm/CARBURETTOR-CARBY-CARBIE-VERY-RARE-SUIT-NISSAN-PATROL-GQ-Y60-TB42-4-2L-RB-3-0L-/221901789001?hash=item33aa609749:g:-yoAAOSw9r1WDRI5


http://www.ebay.com.au/itm/10-PSI-Car-Truck-Fuel-Pump-Vacuum-Carburetor-Valve-Pressure-Tester-Gauge-W-Case-/131631981446?hash=item1ea5e0a386:g:NUwAAOSwo6lWJJk y

[Arfa Brayne]

Carby's are fairly simple to overhaul - as long as you take your time and note where bits come from so they go back in the right place.
Possible problems for your description - check in this order
Fuel filter blocked/dirty
Tank strainer dirty
Sometimes there is a small strainer in the "banjo" where the fuel pipe connects to the carby (above the needle and seat for the float)
Main jet in the carby blocked (most likely the problem) but most work to check.

Regulated compressed air is almost essential for cleaning out a carby, but an aerosol tin of carby cleaner or crc will do.