Outer Limits 4x4 Board

Hi has anyone modified there 3.1td jack to get better fuel consumption, im
getting between 12L to 16L per hundred

How old, how many kilometers?
Any mods?
Standard exhaust?
When was the last time you had the injectors cleaned and pump timeing checked.
How much does your right foot weigh?

the jack has done 240k, injectors have been done , pump timing ok, air and fuel ok, sitting at 80k on a country run you get around 12 to 13l per 100.
mods 2in lift, 245/75 r16 tyres

dogoff,
Not sure what the 3.1 jacks consumption should be, I can only relate to the 2.8 rosdeos which is fairly good.
So heres a few more queries....
Is the exhaust the original standard unit or has it been replaced?
The reason I ask is, I have a 2.8 rodeo, and when I replaced the exhaust on it the muffler was almost completely choked with soot etc, bloody thing just went thud when it hit the ground, didnt even bounce. At 240k it may be worth checking yours.
Also tyre sizes are they the standard size for the jack? If they are larger your odometer will under read effecting your fuel consumption figures.
The trouble shooting guide for the 4jb1t also mentions;
leaking fuek system
clogged air cleaner
poorly adjusted idleing speed
injection nozzle pressure too low
defective delivery valve in the injection pump (keeps dripping)
valve clearences incorrect
low compression
weak valve springs.

Haveing the aero dynamics of a brick doent help either.
do you run with roof racks?
Hope this helps

The only ones i have not had done is the injector pump and exhaust, but
wanting to see if anyone has modeified a pump, turbo and exhaust on theirs to see how successful they have been

dogoff wrote:Hi has anyone modified there 3.1td jack to get better fuel consumption, im
getting between 12L to 16L per hundred

You get how many litres per 100K? I've got a 3.2 V6 Jack.

Think yourself lucky that you own a diesel. I'm getting about 15/100 on the highway! If only somebody would steal or crash into it. Would have no hesitation in giving it the flick. Would have to buy another 4x4 though

Ben

sitting on 110kmhr getting 15 to 15.5l per 100
120kmhr 16l/100

What revs is it sitting on at 110km/h and 120km/h.
My 2.8 t/d rodeo sits on just under 3000rpm at 100km/h at 105km/h its on 3000rpm, getting around 10-11 per 100km. If I go any faster it really starts to chew the diesel, Havn't really worked out how accurately but at a guess if I travel at 115-120km/h it goes to 13-14L per 100km (3100-3200RPM). Also remeber A/C on or window open will add to your usage. Thats all highway.

Ive got the 4JG2T in my Jacka and mine gets about 11 -12 per hundred thats usually doin about 110 down the high way my fuel comsumption improved a whole lot when i replaced the exhaust i put a 2.5" straight through from the turbo back and it seems to do the trick more power and a good note came with it aswel. i also had my injector pump tuned in line with the turbo this helped on the fuel comsumption any dynotune place can do this

when you had your exhaust done did you have your dump pipe part of the turbo done aswell, or just your exhaust

nah mate the whole lot from the turbo back so dump pipe and all

thanks will get exhaust done pritty soon