Thread: TD5 fuel consumption

I got 10.2 litres 100klms sitting on 110 klms an hour towing a Quintrex 4.45 Dory back from Perth to Karratha. Get 15 litres 100 klms towing the van loaded (2,500 kg) at 100 klms an hour.

Filled the tank at Exmouth with 96 litres once.

my last tank of fuel lasted for 850kms and it took 91litres in total. auto td5 disco2. had 300kms of country roads, avg of 81kph(town zones, stop starting included). then 5hrs/100kms of sand driving in 4wd-lowrange, and the remainder was inner city/suburban driving(av speed of 36kph) this is all gps calculated for distances and av speeds. i used the same fuel pump at tailem bend and filled to the second click-off point both times.

Hi All
I just bought a 99 TD5 7 seater saturday fornight ago. I got 850km out of the first tank but that was f3 home and i do the m2 at 5:30 in the orning but its 60km one way to work, I put 85L back in when the light very first came on.
Im on my second tank, did this week 500km and indicator (as accurate as they are) is only half way.
Im stoked so far. Cant wait to do some real driving in it.
Mat

740 km is easy to get IMO. I fill to the brim every time and get over 800 km by the time the light comes on.

I haven't been impressed with the TD5 fuel economy overall, because I get about 10.7-11 l per 100 km pretty much all the time. I have roof racks on with kayak carriers but that didn't make a huge difference.

My dear old TDI (with about 400,000 kms) NEVER got worse than 9.9 l per 100 km, and that was towing almost the whole time. Most of the time it did 8.5 to 9 l per 100 km and I once had 1000 km out of a tank (86 litre refill). Not with the D2 (and that has a 10 litre larger fuel tank), I've never even had 900 km out of it I don't think.

You'd think the TD5 should be better than it is, really.

Anyone getting crap fuel economy on the TD5 should look at getting rid of the EGR valve, I did and it made at least 1 l per 100 km difference to the fuel economy (for the better, that is).

At $1.80 a litre for diesel it's almost an investment!

Originally Posted by owoodland

Anyone getting crap fuel economy on the TD5 should look at getting rid of the EGR valve, I did and it made at least 1 l per 100 km difference to the fuel economy (for the better, that is).

At $1.80 a litre for diesel it's almost an investment!

Is that literally? I've just taken delivery of an antiEGR kit.

its only a fact if your EGR is cactus and leaking...

under the right circumstances removing the EGR does what a hiclone promises to do

gives you more power
gives you better fuel economy.

ok not entirely true, what it will do is bring the engine preformance as near as practicable to what the engine was capable of when it was new. IF youve bought a second handy landy thats always had a dodgy EGR valve you'll not believe what it will do for you. (and you'll wonder why they fitted the stupid thing in the first place)

IF youve got a good EGR vavle and you fit and EGR blanking/bypass kit you'll treat it with the same sceptisism that the hiclone deserves BUT what it will be doing is preventing you from feeding your inlet tract the equivelent of valve grinding paste. Which will assist in preventing you from loosing the preformance of the engine.

is it easy to tell if the egr is playing up? or do you wait until the car runs like a hairy goat & then you know something is amiss

regards paul

yep whip off the intercooler hose from the front of the EGR and with a mirror on a stick and a Small torch look down it If you see black granuals on the surfaces of the plunger valve its more than likely leaking

it doesnt normally run like a hairy goat but the simple test with the engine warmed up is to give it a short sharp rev up to full RPM with no load on it and snap the throttle closed.

What should happen is the engine will drop off to idle rpm and stay there. IF thats the case your EGR is near enough to on spec

IF it drops off, dips below idle RPM then hunts a little before settling down to idle its not doing its job properly (your MAP sensor can also be on the way out)

If you have the granules OR you have the idle hunt issue then its worth pulling the EGR out, cleaning it and replacing it OR bypassing it totaly.

one other thing you might find when you conduct this little test is that you have some oily carbony residue on the front of the EGR and inside the intercooler hose.

That would be the indication that you need to redo the crankcase ventilation system and possabley the turbo seals...