Nissan GQ 2.8 TD Fuel Consumption

Submitted: Tuesday, Jan 15, 2008 at 17:39
ThreadID: 53521 Views:5825 Replies:5 FollowUps:0
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Hi all. I have a Patrol 2.8 GQ manual that i bought new. It has 155K on it and has been reliable. The injectors and fuel pump have not been touched. My fuel consumption is around 17-20 mpg or 14-15 l/per 100k. On a trip fully loaded I have got down to 15 mpg.
Is this what others are getting?
Should I get the pump etc 'tuned' and the truck dynoed?
How do I check the injectors etc?
I live in the Eastern Suburbs of Melbourne and have heard about a Diesel place in Lilydale. Are they any good?
(I cant afford a 6.5 Chev or a 4.2 transplant!!!!)
Ta
Steve
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Reply By: Member - andrew B (Kununurra) - Tuesday, Jan 15, 2008 at 17:47

Tuesday, Jan 15, 2008 at 17:47
Gday Steve

I have a 2.8 GU, and the economy is bad (IMO) around 15l/100km, 20l/100km with the boat on. From what I have been told, the injector pump needs attention every 50,000km on these (the GQ is a bit different I think). With the work done, you get it down around the 12 to 13 I'm told, works out to about $3.00 per hundred km saving, $1500 over the 50,000km (less really as it wears out again!)

Its around the $3000 mark for the reconditioning required, so not that economical for the money spent, although the engine should last longer if the injectors/pump is working well.

I will hopefully be able to compare with a 4.2 next week.............

Cheers Andrew
AnswerID: 281794

Reply By: 93 Navara - Tuesday, Jan 15, 2008 at 18:16

Tuesday, Jan 15, 2008 at 18:16
Dieseltec in Lilydale have a good reputation and will dyno your truck and adjust your fuel and boost if required. Alternately, one of the guys here at work has one and his economy was slowly getting worse. He just cleaned the Oxygen sensor and it improved his power and economyto what it was.
AnswerID: 281802

Reply By: Kumunara (NT) - Tuesday, Jan 15, 2008 at 18:50

Tuesday, Jan 15, 2008 at 18:50
Red Patrol

I had a 2.8 TD GQ Patrol and I averaged 12.5 ltrs/100km. It depends on how you drive it but you should be getting better than that. Mine seemed to get better at 150,000 kms than when I bought it.

Be careful to check when they change the coolant on the 160,000 service that it is done correctly. There is a bleed valve on the top hose. If that is not used there will be an air lock which will result in problems such as a blown head gasket or worse. Don't trust your mechanic. Double check it yourself.

The 2.8 has a different diff and gearbox to the 4.2. I would not recommend putting a larger motor in it.



Tjilpi
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AnswerID: 281807

Reply By: Patrol22 - Tuesday, Jan 15, 2008 at 20:15

Tuesday, Jan 15, 2008 at 20:15
Red Patrol

This subject has be discussed at length on the Patrol Forum. I like many other have averaged over the 230000km my truck has travelled and pretty good 12.33 ltr/100 km. This has been down to mid 9s when chortling along the highway unladen to 17+ in sand and towing. The only service I've had on my fuel system was to recondition the injectors at 200000km - the pump has not been touched.

Check out Patrol Forum discussion. There are other threads as well so just do a search.
AnswerID: 281830

Reply By: Red Patrol - Tuesday, Jan 15, 2008 at 22:05

Tuesday, Jan 15, 2008 at 22:05
Thanks guys for your comments. I dont think that mine has an oxygen sensor that came with the computer in the GU. I guess its time to go to the Diesel gurus for guidance.
Steve
AnswerID: 281858

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