Thread: my D2a TD5 is a pile of dog poo!

Sorry Phil if this has been already been mentioned in this thread as I have not read the whole thread and it may be a long shot , the fact that you are not getting great Fuel Economy in your TD5 MAY be that you are loosing Fuel thru the Injector seal into your Sump and as a dummy mechanic 101 that it seems quite logical to check the Sump for fuel contamination. have you checked your Oil for any contamination????

Originally Posted by DEFENDERZOOK

its not just yours thats lacking in the fuel economy dept........
it appears that that quite a few of us are having similar issues......
so im sitting here following this thread waiting for result so i can sus mine out as well......
yesterday i cleaned a heap of mud out of my radiator and intercooler......
hopefully that should help the turbo.....giving back a bit more power...which means ill need less go pedal......
which should hopefully mean less fuel usage........
if you have two identical cars you can interchange bits between......
try swapping different sensors between the two......and see if you transfer the problem from one to the other........ i didnt try that exactly but most of the sensors have been replaced by OEM ones within the last 6 months.

im quite happy to swap any bits you may want with lurch if it helps......
just give me a buzz......you got my number.........
im thinking the quality of fuel in australia may have something to do with all this......
yes and no, redbacks D2 gets better economy towing than mine dose not towing and LRh's D2 is also easy double the economy that i get, and before i gave it back ide done a 1/4 of a tank and did 200ish k's and thats from the same servo as i use.

Originally Posted by LandyAndy

Hi Phil.
Sorry to hear you are still banging your head against the wall!!!!
235/85 tyres do make the D2 TD5 work hard,they sent my consumption thru the roof.Any chance of trying a few tanks on the OEM tyre size???
my tyre size is 255 70 R16, thats exactly 25mm bigger than the 18's, so even if i factor in the height differance is still isnt close to the economy i should be getting. ,bear in mind the 235/85 adds roughly 10% to the odometer reading,you have actuallt traveled 10% further than indicated.(will make your figures sound a little better)
My consumption did get as bad as yours(man with MSB ECU) Since a new MAF,new temp sensors,and NNN ECU with strong tune I have returned to an "indicated" 800km per tank(+10% due to 235/85 tyres).It is a totally different beast to drive,yet to fit the new ASE intercooler.I do use the new found life,also note I dont need to push the loud pedal past half way,in the past it was always to the boards.
GOODLUCK,hope you beat the issue soon.
Andrew

Originally Posted by mike 90 RR

Since we are in the "wild card" region .... Have you put a dial gauge (or ruler) on the rockers? to check the lift of the Cam lobes?

ah no, but if/when i have the top of next i'll have a look.

Originally Posted by Disco_owner

Sorry Phil if this has been already been mentioned in this thread as I have not read the whole thread and it may be a long shot , the fact that you are not getting great Fuel Economy in your TD5 MAY be that you are loosing Fuel thru the Injector seal into your Sump and as a dummy mechanic 101 that it seems quite logical to check the Sump for fuel contamination. have you checked your Oil for any contamination????

i had an oil test done and it returned 5% diesel dilution, over 20 000k's thats bugger all, and in that time its never used or made oil.
the 5% was most likley due to me changing the injectors twice and having the fuel in the head drain into the cylinders and past the rings into the sump.

cheers phil

What you need is a computer fan in the air cleaner.
Regards Philip A

Originally Posted by mike 90 RR

Since we are in the "wild card" region .... Have you put a dial gauge (or ruler) on the rockers? to check the lift of the Cam lobes?

This is actually the most intelligent response I've seen on this thread. I've read the entire thread and it certainly had me puzzled. But years ago I remember my dad's petrol cruiser (FJ55) economy went down from 19MPG to 13MPG. No noticeable difference in power nor any other symptoms. Stripped the motor down and noticed the cam lobes were nearly round. Got another one from the wreckers and the economy went straight back up to 19MPG.
If you've replaced/checked all the electronics, it comes down to mechanicals. And it seems there are others on the forum with terrible economy from their TD5 too. Cam wear may be the factor...

Originally Posted by brianwood

This is actually the most intelligent response I've seen on this thread. I've read the entire thread and it certainly had me puzzled. But years ago I remember my dad's petrol cruiser (FJ55) economy went down from 19MPG to 13MPG. No noticeable difference in power nor any other symptoms. Stripped the motor down and noticed the cam lobes were nearly round. Got another one from the wreckers and the economy went straight back up to 19MPG.
If you've replaced/checked all the electronics, it comes down to mechanicals. And it seems there are others on the forum with terrible economy from their TD5 too. Cam wear may be the factor...

Must of been a special FJ55 I never saw one go anywhere near 19 MPG

not a bad suggestion following on from these comments

http://www.aulro.com/afvb/wa-aulroia...-camshaft.html

steve

the camshaft is a possibility, I've defiantly looked at it but not stuck a DI on it to test the lift.
one thing is though, if the lobes were worn that would equal less lift and that would have an effect on performance...but my TD5 still puts out 86.9kw at the wheels with a ''140kw'' chip, so not really lacking in performance. (140kw -40% loss for auto trans= 84kw)
and the next thing is I would have seen signs of worn lobes, that sticks out like dogs balls to a machinist and I can tell you that every lobe still has traces of its initial grinding around the circumference, no signs of ware like the V8 cams.

speaking to JC today and im going to remove the gallery from the auto and check the main gasket for damage. he's had a few suffer this issue so its a good start point.

cheers phil

Originally Posted by PhilipA

What you need is a computer fan in the air cleaner.
Regards Philip A

bloke at work has just installed one of these ''superchargers'' to his petrol hilux.... its on an on demand switch so when its struggling up a hill (read toyota and normal) he turns it on and apperently there is a real improvement in performance! wow....
but.... this is also from the same bloke that says the when he was an ambo driver he would hook up the oxygen cylinders in the back to the carby on the F truck and it would fly like it was on nitrous....again....WOW

cheers phil