What to check to reduce MPG?

Post by **Ammo** » Wed Apr 11, 2012 11:32 am

littlefeller wrote:do you use a piggy back ecu tuner?

No stock JDM ECU it's still even in KM

Post by **Merlin** » Wed Apr 11, 2012 11:34 am

Any CEL's or stored codes (for clues) even?

Post by **Ammo** » Wed Apr 11, 2012 11:35 am

Nope, no CEL lights at all

littlefeller · Post by **littlefeller** » Wed Apr 11, 2012 11:36 am

supose it would depend on what you consider normal driving. i get well over 40mpg on motorway (but thats prob down to the auto box) but i drive to work (around 200 yards) and would be lucky to get 5mpg. have you tried it on the motorway lately?

Post by **Ammo** » Wed Apr 11, 2012 11:38 am

on a 200 mile round trip I got 16mpg

littlefeller · Post by **littlefeller** » Wed Apr 11, 2012 11:42 am

Ammo wrote:on a 200 mile round trip I got 16mpg

you got a problem

but why doesnt ecu flag this, i cant see how this could be going through you motor with out the ecu throwing a fit, that would be around twice as rich as it should be. so can it go anywhere else?
what exhaust and or airfilter you using?

Post by **Merlin** » Wed Apr 11, 2012 11:46 am

In a car with a normal working engine you would have to do at least 50 miles of full WOT to get MPG of 16 or below (averaged across a full tank with average driving the remaining distance).

littlefeller · Post by **littlefeller** » Wed Apr 11, 2012 12:10 pm

are your sums correct, yes i know its a daft question but hey you never know

Post by **Merlin** » Wed Apr 11, 2012 12:13 pm

^^ yeah, I assume that was a full tank then if you got 16mpg from 200 miles?

Ratty once had a fit when he thought his 3G was getting low MPG, his maths were wrong

Post by **Ammo** » Wed Apr 11, 2012 12:21 pm

yeah full tank finished in 200 miles, maths might be wrong but still should get more than 200 miles to a tank

Just pulled the plugs

Never remember what colour is good and what is bad