Poor Fuel Consumption VP V6 in Triton

[Russell VP]

Hi, About 6 months ago i replaced the 2.6 litre 4 clyinder in my 2wd Mitsubishi Trition with a VP V6 engine/auto. Swap was dead simple. I realise the fuel economy would not be as good as the Commodre due to running the standard 4.2 diff. (2500rpm / 100ks) I am getting around 18L per 100k. Which is 50/50 with highway and town driving taking it very easy. I have changed the Coil Pack and DFI Module, New leads, Crank angle sensor, Oxy sensor,Map sensor, new air cleaner element and have run injector cleaner with no effect on reducing economy. Apart from Fuel economy the things starts and runs great. Maybe this is as good as its going to get. Any Ideas?

[VPCalais38]

I average 12.9L/100km in my calais.

Used to average 17.8 before I changed the oxygen sensor.
As you have already done that it may be something else.
Can you get fault codes out of the computer?

[Russell VP]

thanks for your reply VPCalais38. I have fixed it by replacing the Coolant Temp sensor.

[KRUPTD]

I would suggest replacement of diff gears so the engine would rev lower,this will help dramatically in fuel consumption.Also have a good air intake setup to allow nice cool air into the engine.I used to have a hilux 2wd single cab with a worked 308 2000rpm stall trimatic shift kitted auto and 3.1 lsd borg warner diff and on a trip i would average around 15L per 100km and then around town would get up to 22L per 100km.