Outer Limits 4x4 Board

hi guys need some help i know the tb42 are not great on fuel this is my first petrol 4x4 i am a diesel man can some one help me on where to start looking to get better fuel economy these figuers are from road driving no off road where do i find the problem.

No problem there, 22.5L/100km sounds about right. Won't get much better than that unless you drive like a granny.

Welcome to the world of the TB42. Do a search, many threads on people's attempts to reduce the fuel consumption.

I have a SWB on gas, only running 32's, its an auto im lucky to get 350kms from 90 Litres... and thats driving it like a granny

I have a SWB GQ Auto (petrol only) which I have owned since new (Jan 89) and which is now on its second engine. Around Sydney suburbs I get 22lit /100K and on the open road about 18lit/100K. All seems normal to me.

Onya.

i have a 89 gq wagon auto gas fuel 35s and get 300kms to 90lts gas and about 170kms to 40ltrs petie nd thats hwy driving the word tb42 nd fuel econamy dont come in the same sentence.

You could improve your fuel economy by going to stock suspension and 29" highway terrains, 3.9:1 diffs... That's how my shorty started and it got a good 16l/100km. A bit of lift, bigger tyres, aggressive tread, and 22 (petrol) to 28 (gas) litres per 100km is normal.

In your case going by your sig line I would say your tyres are murdering your fuel economy. One question though, is your speedo calibrated for the 35s or have you compensated for this in working out your fuel economy?

Sorry.

hay chimp boy thats cool the sig line is for the comp truck it is a rocket the truck i am talking about is a new one i have just bought it has 285 wranglers tryes air lockers frount and rear and a 2 inch lift i have known the truck for a few years and i dont rember it being this bad on fuel it is an injectered model to some body told me that a coolant temp sender might be runing the engine cold

37's , 4.11 diffs, and efi turbo, and the best i get is 25l/100, or about 300kays out of a 90L tank. Thats babying it to, shifting early on the hills, and hitting the hills about 120.

ratbagpatrol wrote:.... bad on fuel it is an injectered model to some body told me that a coolant temp sender might be runing the engine cold

Yes, it can be, because the computer will pump more fuel into the motor, because it thinks its in start up mode, so it in-riches the fuel mixture. Another problem can be, that the viscus fan has been replaced with fan blades, which are more aggressive, and it will cool the motor down to much, and the computer will go into cold settings, and once again, it will push more fuel into the motor.

Another problem might be, that your injectors are worn out, and are dribbling fuel, instead of throwing a good spray, and not burning correctly.

If you want to do the basics, have a go at the below,
new fuel filer
New plugs
New air filter
New oil, and filters
new thermostat
and if its efi with a few kays on it, get some new injectors..


just the basics really,,,,

yeah sounds about right they seem to average 4klms per litre, the 454 chevy in mine is cheaper to run than the tb42 ever was....

Try a set of 3.9 diff gears improved mine a little.

thanks reddo will give it a go mate