Fuel Consumption GQ 2.8TD

Submitted: Wednesday, May 10, 2006 at 20:16
ThreadID: 33769 Views:1726 Replies:6 FollowUps:5
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Hi All,
Seems that my Patrol, (141K manual 2.8 TD) , bought new in 97, has recently been getting poor fuel economy. I was averaging around 25 mpg but now am averaging about 19mpg, nothing else has changed, still got the roof racks, drawers etc. It still has the same amount of power (Not much down low enought over 1800rpm) but just extra fuel going in. Does this mean I need to get the injectors cleaned???? My mechanic has suggested a diesel pump tune I think it was ( acouplea years ago). I have a 2.5 inch exhaust dump pipe back and am happy with the truck. Please no comments about 4.2 engines. I've read them all.
Cheers
Steve
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Reply By: Patrol22 - Wednesday, May 10, 2006 at 20:22

Wednesday, May 10, 2006 at 20:22
Steve
I have a Gu 2.8 TD and a similar thing happened to me when I used Woolies/Caltex fuel......don't know why but when I changed back to Shell all was hunky dory again.
AnswerID: 172003

Follow Up By: Patrol22 - Wednesday, May 10, 2006 at 20:23

Wednesday, May 10, 2006 at 20:23
....and mine has 188000kms on it.
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Reply By: Member - Chris M (QLD) - Wednesday, May 10, 2006 at 21:43

Wednesday, May 10, 2006 at 21:43
My old man in law has a 2.8 and is stoked with it, complaining of lower figures. But he has over the years added nearly every aftermarket fitting you can buy. Still getting low nines per litre. I think that's awesome. Think about the injectors, most manfacturers recommend every 100k replacement.
AnswerID: 172033

Reply By: outback epicurean - Wednesday, May 10, 2006 at 22:04

Wednesday, May 10, 2006 at 22:04
Hi

I seem to have the same problem with my 2.8 TD 97 model. Used to get 8-9 km/l but now 6-7. 100K Use Caltex fuel so perhaps need to consider another choice?

Re injectors/pump, what is the correct service? I have had very mixed results talking to mechanics, from if its not blowing smoke its fine to the need for a complete overhaul. Any ideas appreciated
AnswerID: 172038

Reply By: Brew69(SA) - Wednesday, May 10, 2006 at 22:12

Wednesday, May 10, 2006 at 22:12
Same tyres?
AnswerID: 172040

Follow Up By: Red Patrol - Wednesday, May 10, 2006 at 22:43

Wednesday, May 10, 2006 at 22:43
Yep same tyres. I might just take it for the big service and get the injecters cleaned off the engine and get the pump re done.
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FollowupID: 427602

Follow Up By: ACDC - Thursday, May 11, 2006 at 21:10

Thursday, May 11, 2006 at 21:10
For that sort of mileage i find it hard to believe it needs injectors and pump done.
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Reply By: Gu_Patrol - Friday, May 12, 2006 at 07:36

Friday, May 12, 2006 at 07:36
You could get a Hot Set Diesel Flush.
AnswerID: 172239

Follow Up By: Red Patrol - Friday, May 12, 2006 at 12:59

Friday, May 12, 2006 at 12:59
What is a Hot Set Diesel Flush???
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FollowupID: 427897

Reply By: Gu_Patrol - Friday, May 12, 2006 at 22:25

Friday, May 12, 2006 at 22:25
www.wurth.com.au/hotset.asp

I know a few guys have used it and it did the job.

best be done by a diesel mechanic
AnswerID: 172394

Follow Up By: Red Patrol - Saturday, May 13, 2006 at 11:50

Saturday, May 13, 2006 at 11:50
thanks for all the replies. I like Wurth stuff so will give it a try and rply to the forum.
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