Fuel

[Andrewjill]

Hi guys i have a 2013 colorado RGit seems to be using more and more fuel it has done 99,000km when i bought 85,000km it was 9.8/100km i had a ironman bullbar fited around 6 months agothen it went to 10/100km and stayed at that but in the last few days its gone to 11.3/100km and to 12.1/100km i have orderd a new complete 3' exaust from turbo back but havnt fited it yet dose anyone have any idears to why my fuel conumtion is climbing i also have fitted a new air fillter thinking this may of been the problem but it was a repco around 2 weeks ago but still fuel usage climbing every thing is stock on it and running stock tyres at 38psi and it is surviced by holden regulary i do the same treck to work on a sealed road about 60km return and sit on the sane speed 108kmh any information would be much appreciated

 

[Les PK Ranger]

Hiya Andrew.

I take it you are getting your fuel usage from direct hard data when you fill up ?
Fill up, take km and lt info and work out lt/100km from that.

You aren't just having a bad run with head winds are you ?
That is certainly enough to push fuel use up.

If there is a rise in fuel usage, it could be a lot of things mechanical or electronic, unfortunately.
Injectors, pump, EGR system causing issues with dirty intake and / or MAP sensor, possibly something like PCV system, could be intercooler not functioning ideally, a failing sensor (one of many) sending incorrect info to ECU.

Usually some of these things can be slow to appear, so it might be some sort of injector system or sensor problem.

Get one of these if you want to self analyse info from your computer when driving . . .
EDS scan tool

I find info from the computer is interesting to monitor, get to know our usual numbers and when something goes astray you can have an early warning to check it out.

Used to be if your engine wasn't performing as usual, you generally had a fuel or air supply issue, but with modern engines it's a lot harder to diagnose and work out any failings.

A good dyno can pick up problems, with new exhaust going on maybe hunt down a reasonable dyno cost and get it all checked out / tweaked.

 

[Cokedaddy216]

Well I've said it enough times on here but whatever , I was at the hardware the other day in my new Hilux ute which impressed the owner ,
got a frigging fuel guzzeling piece of shit Mazda he says , wanted a hilux while drooling over it
I pulled me bottle of fuel doctor from the door you need some this they sell it down the road
So I say how that gear go , I'll be telling every person I know about that gear he says frigging crazy the way things have changed

 

[Andrewjill]

Hi guys i have a 2013 colorado RGit seems to be using more and more fuel it has done 99,000km when i bought 85,000km it was 9.8/100km i had a ironman bullbar fited around 6 months agothen it went to 10/100km and stayed at that but in the last few days its gone to 11.3/100km and to 12.1/100km i have orderd a new complete 3' exaust from turbo back but havnt fited it yet dose anyone have any idears to why my fuel conumtion is climbing i also have fitted a new air fillter thinking this may of been the problem but it was a repco around 2 weeks ago but still fuel usage climbing every thing is stock on it and running stock tyres at 38psi and it is surviced by holden regulary i do the same treck to work on a sealed road about 60km return and sit on the sane speed 108kmh any information would be much appreciated

Thanks for your repkyThe info i get is from the car fuel display i have recet it a number of times as i thought it may be a few bad runs such as wind but it still shows the 12.1/100km sometimes it may drop to 10.3 to 11.3/100km but climbs strait back up to 12.1/100km its only got worse over the past week

 

[Les PK Ranger]

Thanks for your repkyThe info i get is from the car fuel display i have recet it a number of times as i thought it may be a few bad runs such as wind but it still shows the 12.1/100km sometimes it may drop to 10.3 to 11.3/100km but climbs strait back up to 12.1/100km its only got worse over the past week

Andrew, do the fuel used manually when you fill.
Computer fuel use isn't accurate, only a guide.

 

[Hoyks]

When was the fuel filter last changed?
On my old Courier when the filter started getting gunked up then the fuel consumption would go up. Try changing where you fill up too, different fuel quality can make a difference.

 

[Cyberess]

It's been a little hot lately -- heat makes a massive difference to fuel economy

 

[Aza013]

Hot days = Air con......drink drink + any of the above

 

[Trophy truck 481]

fill up early in the morning as the fuel has cooled down
check your map sensor and give it a clean
use BP ultimate or caltex vortec diesel

what's on the roof? lights on the front bar? weight of gear in the back

are you servicing it or is the mechanic doing it?

it's not new to you anymore and you drive it a little harder because it now feels a little gutless to when you first got it

do yourself a favor, wash it , polish it clean it out , you'll fall in love with it again
reset your computer every time you use it and do the fuel figures at the pump , mine is 2km/L out

 

[Andrewjill]

Thanks guys i cleaned the mas air flow sensor and it has droped from 12.1/100 to 10.3/100 sometimes as low as 9.9/100 strait away first drive to work and that was in a hurry as well with the aircon blasting

 

[Les PK Ranger]

Thanks guys i cleaned the mas air flow sensor and it has droped from 12.1/100 to 10.3/100 sometimes as low as 9.9/100 strait away first drive to work and that was in a hurry as well with the aircon blasting

Also do the MAP in the intake manifold . . . MAF / MAP sensor clean
These usually get really caked up.
Link for basic info on the clean / right cleaner, process . . . the Colo should have map in similar location on inlet manifold, and look similar to locate.