GQ 4.2 Tdi Breaking down under load

Submitted: Sunday, Apr 16, 2006 at 00:44
ThreadID: 32924 Views:1933 Replies:4 FollowUps:13
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Ive changed the fuel filter today 15.4.06 and very dirty I thought this was the problem, also I notice a small vaccum hose of from rear of alternator put it back on, but still braking down under load, but can get to speed if accerate very slow and even, just started to happen this morning. 1990 high roof auto 338,000ks always been very good on service and maintenance. I think maybe injectors or pump dont know where to start. I dont know if this area has been look at in the past as im not the oringinal owner. If any suggestions for injectors etc, where is place to buy south of Perth?? Fuel consumption has been a bit poor of late. Normaly 650+ ks per tank now bearly 550ks.

Thanks for any ideas or help George?Trish
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Reply By: wallypop - Sunday, Apr 16, 2006 at 06:38

Sunday, Apr 16, 2006 at 06:38
hi there i had same problen in my 80 series diesel turned out to be a dirty filter in the tank and i meen dirty it wouldnt pick up enough fuel i hope this helps

...............len
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Reply By: Geoff M (Newcastle, NSW) - Sunday, Apr 16, 2006 at 08:14

Sunday, Apr 16, 2006 at 08:14
Hello George,
What Len said above is good, also look for air leaks into your fuel system. Cracked or split rubber lines. Leaking primer pump seals, (I assume this vehicle has a primer pump, I've never owned a Nissan)
Basically anywhere the fuel system can pull air in under load.

Geoff.
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Follow Up By: Marn - Sunday, Apr 16, 2006 at 10:12

Sunday, Apr 16, 2006 at 10:12
There is also a fine gauze filter in the injector pump that can block up. Sorry I dont know exactly where as a friend told me this but apparantly it stops stuff that gets through the filter.
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Follow Up By: Truckster (Vic) - Sunday, Apr 16, 2006 at 11:48

Sunday, Apr 16, 2006 at 11:48
That gauze filters only on GQ's, and its on the banjo bolt on the fuel pump itself.
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Follow Up By: Marn - Sunday, Apr 16, 2006 at 12:55

Sunday, Apr 16, 2006 at 12:55
Probably worth a look then. My mate had problems with his after using drum fuel. It must be finer than the filter??
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Follow Up By: bombsquad - Tuesday, Apr 18, 2006 at 09:37

Tuesday, Apr 18, 2006 at 09:37
A Mate has a GU ute with a gauze filter in the pump which has given him problems, so Its worth looking into (series 1 4.2TD)

Cheers Andrew
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Reply By: 58BAZ - Sunday, Apr 16, 2006 at 11:39

Sunday, Apr 16, 2006 at 11:39
While travelling on a recent trip of the west coast of Tasmainia ,in the middle of nowhere my GU 4.2TD played up so bad I couldn't get over 2000rpm ( towing a caravan)
I'd heard about a small gause filter where the fuel line goes into the injector pump unable to find it we were stuck on the side of the road for many hours and lots of other travellers offering help I continued to Zeehan (slowly) the mechanic at the service station new exactily what was the problem the small gause filter in the injector pump.The bolt holding the fuel line to the injector pump had to come out and a spring under that also. useing a bolt not much rounder than a pencil placed in to the hole and turning it gently so the thread catches the filter when removed its no bigger than the rubber on a pencil.
It was black and blocked.We blew it clean with an air hose put it back together and my GU was back up and running. Maybe this is worth a try.
AnswerID: 167223

Follow Up By: Truckster (Vic) - Sunday, Apr 16, 2006 at 11:49

Sunday, Apr 16, 2006 at 11:49
You had the gauze filter on your GU? We searched on 3 of the club members ones for them, and never found one yet... interesting.
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Follow Up By: Marn - Sunday, Apr 16, 2006 at 18:10

Sunday, Apr 16, 2006 at 18:10
Take the beer goggles off???:)
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Follow Up By: Truckster (Vic) - Monday, Apr 17, 2006 at 09:24

Monday, Apr 17, 2006 at 09:24
nope no beer goggles. we were actually on a trip when a dude got some bad fuel, we thought the same thing.
Then when we setup camp, others became interested if theirs had the filter, which none had heard of before. None had them.
Wondering if its one of them pick a part out of a bin type things that nissan are becomin famous for.
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Follow Up By: Member - Ed. C.- Monday, Apr 17, 2006 at 13:45

Monday, Apr 17, 2006 at 13:45
Truckster,
w/- the vehicles you mention, did ya's determine the absence of said gauze filter/strainer simply by "eyeballing" (after removing banjo union), or did ya's have a "feel" in there with a "suitable object"??

The reason I ask is this....
First time I removed the strainer on mine ('99 TD42T) as part of pre-trip inspection, when I removed the banjo union & had a look in there, my first thought was "uh-oh, looks like somebody's forgot to put the strainer in here" (or that Nissan had indeed done away with them).... Simply couldn't see it just by looking....
Anyway, just to be sure (to be sure), I had a "bit of a feel" down there with one o' them "o-ring picker-outer" thingys, and Bingo! out she came (spring too)...

May I (respectfully) suggest that ya's might like to have another look:-))
Doesn't make sense to me that they'd put 'em in some, & not others...

I am aware that some people think that these strainers are a PITA, and that many remove them & "forget" to replace them.... Personally, I don't think this is a good idea, as this is the "last line of defence" for the pump, and any problems w/- strainer blockage can be easily avoided by regular inspection (& cleaning)....
Confucius say.....
"He who lie underneath automobile with tool in hand,
....Not necessarily mechanic!!"

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Follow Up By: RedGibber - Monday, Apr 17, 2006 at 20:00

Monday, Apr 17, 2006 at 20:00
Recently serviced my '02 TD42T GU and can confirm that the gauze filter under the banjo DOES exist!!
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Follow Up By: Truckster (Vic) - Monday, Apr 17, 2006 at 22:42

Monday, Apr 17, 2006 at 22:42
hey Ed.

yea no stress dude, we used a small 'scrib' type tool with a curl on the end.

Also a screw driver, torch and finger to search!

Again, I think its one of those things that if they ran out of them, the cars would continue to roll off the proddy line.

Same with GQ's some have it (mates Manual same yr, same model as mine, same spec) has it, mine didnt...
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Follow Up By: Member - Ed. C.- Monday, Apr 17, 2006 at 23:12

Monday, Apr 17, 2006 at 23:12
Well there ya go.....

Have always thought they were a "standard fitment"..

Still have to wonder why they'd fit 'em in some & not others???

Looks like your theory may be correct :-)

Confucius say.....
"He who lie underneath automobile with tool in hand,
....Not necessarily mechanic!!"

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Follow Up By: Recyled Teenagers - Monday, Apr 24, 2006 at 00:34

Monday, Apr 24, 2006 at 00:34
Thanks to everone for your suggestions
I "found" the filter in the banjo bolt , It was a little dirty. Anyways I fix the problem the owner of the 4x4 ( ME ) having a think attack put unleaded petrol in the tank about 40lts and didnt even think twice about it was 12.31 in the morning. Still no excuss only did approx 4/5 ks . Ive drained the tank, changed filter bleed all the lines goes realy good now. At least I found the filter in the banjo bolt I went to the local libary to view a genuine Nissan workshop manual and it doesnt even list it in there. It does exists.
Thanks everyone

George
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Follow Up By: Recyled Teenagers - Monday, Apr 24, 2006 at 00:36

Monday, Apr 24, 2006 at 00:36
Thanks 58baz found filter all goes well
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Reply By: Recyled Teenagers - Sunday, Apr 16, 2006 at 22:15

Sunday, Apr 16, 2006 at 22:15
Thanks for ideas on this problem I will start with the gauze filter first ( thats if i can find it ) and see how it goes then try vacuum hoses and fuel pump . I will get back to you all in the next couple of days to let you know how I got on.

Thanks again .... First time I have used this site and its been a good responce. Found exploroz.com by acciedent

George&Trish (Recyled Teenagers)
AnswerID: 167293

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