nissan owners i need help please

Submitted: Tuesday, Dec 18, 2007 at 20:56
ThreadID: 52667 Views:2665 Replies:7 FollowUps:3
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a friend of mine has a 99/GU /td4.2 patrolwell today it started to cough and splutter like it was sucking up dirty fuel he got it home blew fuel line back to tank, put on a new filter, with fuel in it started car , ran for a while then stopped
ok problem is now he cant manually pump fuel from the tank with thehand pump on top of filter.
can anyone help with an answer as to what i can tell him to do other than getting it towed to a garage im in Newcastle he is 250ks away in Tamworth
any help will be appreciated

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Reply By: desert - Tuesday, Dec 18, 2007 at 21:09

Tuesday, Dec 18, 2007 at 21:09
First, you have to confirm that the fuel line is clear by double checking that air is able to be pushed back into the tank. Next, the hand pump could be shot. They do not have a long life expectancy and are marginal even when new. Disconnect the in-side and the discharge side of the pump and by using a small container of fuel, operate the pump to see if it moves fuel through. If not, you could bypass it and wire up a temp. electric primer pump from Repco or even the local wreckers. Third, disconnect the banjo fitting where the fuel line goes into the fuel pump. Down inside the orifice is a brass gauze type filter, discard this item and refit the banjo, prime with electric pump and off you go(hopefully).
AnswerID: 277341

Follow Up By: Ozboc - Wednesday, Dec 19, 2007 at 22:30

Wednesday, Dec 19, 2007 at 22:30
i Have had this little filter inside the fuel pump block up on many occasions - why would you disgard it ? its obviously there for a reason, and that would be to stop crap clogging up the pump or injectors ---- i now carry socket set at all time with me and 2 or 4 replacement aluminum washers from the bango fitting ( get from any good fastener shop for $2 or so ) In the event that little filter does block up , and strangely enough - it always seams to get blocked up with what looks like material from the main fuel filter ???

But as Desert suggested -- check this filter - its a 17 mm socket - take out the Bango bolt ---- then the 2 sealing washers -- then in the hole you will find a small spring and then under that the filter --- i use a cotton tip to help get the filter out .....


if this filter is blocked the tell tale signs will be a very auditable clicking/tapping sound from your fuel pump - almost like an old tired motor that needs all the lifters adjusted - this indicated the fuel pump is either starving for fuel or has an air leak somewhere ( in the case of the dodgey primer pump)

theses would be a good place to start

also be sure to check the bango fitting once you have it tightened down again - prime up the line and when its pressurized look at the fitting you just removed to make sure you cant see any fuel leaks - this will also be a place where air leaks can happen

Boc
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FollowupID: 541509

Reply By: Member - Luke (SA) - Tuesday, Dec 18, 2007 at 21:22

Tuesday, Dec 18, 2007 at 21:22
Without being a smart arse, is there enough fuel in the tank?? Maybe your friend almost ran out and hasn't realised.
If not
I would try filling the filter back up and pumping it up again. and when it starts up I would try to keep it running, even if it needs the revs kept up to keep the engine running. Try that a few times and if that don't work then I would be stuffed to :)

If he thinks he has dirty fuel I would drain it and put some new stuff in

I have never had this problem before but that's what I would do!!

Hope this helps and good luck

Cheers Luke
AnswerID: 277347

Reply By: GerryP - Tuesday, Dec 18, 2007 at 22:04

Tuesday, Dec 18, 2007 at 22:04
Seeing you have emptied the line back to the tank, you will need to disconnect the line from the filter going to the engine, while you are priming. With the line still connected, there is virtually nowhere for the air/fuel to go - in other words, you are trying to pump into a sealed injector pump system. With the line disconnected, pumping should become easier. Once you get fuel back up, then reconnect, prime until full resistance is felt, then if all is well, the car should start and keep running.
Good luck
Gerry
AnswerID: 277356

Reply By: Member - len W (NSW) - Wednesday, Dec 19, 2007 at 08:18

Wednesday, Dec 19, 2007 at 08:18
thanks guys for your quick response he now has all information we will see what happens ill let you know how he gets on i think it might be that pesky little filter in the pumpwell lets hope so anyway...................len
AnswerID: 277383

Follow Up By: Member - Roachie (SA) - Wednesday, Dec 19, 2007 at 10:15

Wednesday, Dec 19, 2007 at 10:15
Len,

What GerryP said (above) is the most important aspect of this mentioned thus far. You simply CANNOT pump the hand primer when the hoses are all hooked up. Just to re-affirm....... you need to undo the outlet hose on the front side of the fuel fitration head unit (just to the right of the primer-pump as you stand looking at the primer from the driver's side mudguard). Best to place a plastic bottle under the outlet hole to catch the diesel that will (hopefully) start to spirt out. Leave the other hose connected as this will "prove" that fuel can in fact be drawn up through from the tank.

Once you're satisfied that this part of the fuel system is okay, and if you've checked the small gauze filter (not sure whether it's a great idea to totally remove this little bugga), then the only other thing to do (if it still won't run and you still suspect air in system), is to systematically crack each of the injectors and pump the primer to make sure each one is okay.

I have found that fitting a small electric FACET pump is a sound investment too.....it means that the lift pump doesn't have to work as hard and should increase it's life expectancy. FACET pump can be placed anywhere between the tank and the filter inlet.

Cheers

Roachie
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FollowupID: 541359

Reply By: Member - beachbum - Wednesday, Dec 19, 2007 at 08:45

Wednesday, Dec 19, 2007 at 08:45
Ian the GU's have a very small gauze filter fitted under the banjo fitting on top of the injector pump. Remove the banjo Fitting and use a cotton bud to remove the filter. They fit perfectly . There is also a small spring in the hole and have found it to be on top of the filter or under it. so perhaps you may encounter it first. The bloody thing gets no mention in any service manual I have seen but it is most definitely there and blocking is common
Good luck and it is not always so potentially catastrophic as first assumed
AnswerID: 277384

Reply By: Kenny Wilson - Wednesday, Dec 19, 2007 at 19:06

Wednesday, Dec 19, 2007 at 19:06
Did the GU's come with the 4.2 or 4.5

AnswerID: 277477

Follow Up By: Kenny Wilson - Wednesday, Dec 19, 2007 at 19:06

Wednesday, Dec 19, 2007 at 19:06
sorry just read it was a Diesel

My mistake
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FollowupID: 541436

Reply By: nowimnumberone - Wednesday, Dec 19, 2007 at 19:18

Wednesday, Dec 19, 2007 at 19:18
if the hand pump isnt working
take the fuel return line of the pump
little hose to the pump at about the second injector.
and use a air compressor to blow back to the tank with the main fuel hose of the filter
AnswerID: 277483

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