Thread: excessive fuel consumption!

Originally Posted by discowhite

ive done a few k's in the D2a now and i still cant get better than 15L per 100klm.

so far ive replaced the maf, with a cheap one from the UK. it made the car drive better and feel more responsive. both the new maf and the OE one have very simmilar readings in the nanocom, 49@idle and 525 under load. the gear changes are deffinatly better with the new maf.

the car has done 160thou its had it engine and wiring harness replaced.
its now chipped and minus center muffler and egr system.

the fuel consumption has improved by 1L per 100klm after the ecu tweek!

where else can i look to improve the consumption?
the bloody 90 had a massive chip and used only 13/100

cheers phil

Phil,

I have a similar problem. Had my ECU reset to standard a while back and fuel consumpton increased. Reprogrammed the ECU with no difference (first time I reprogrammed it consumption dropped). Have disconnected the MAF sensor and found no difference in the way the motor runs (apparently the sensor disconnect does not produce a dramatic difference with TD5's and is more noticeable on V8's.) Cleaned the sensor - still no difference.

I'm stumped.

Cheers,

Franz

Could there be a problem with the auto maybe causing drag or a blocked thingy in the airbox (you know that twirly thing) wastegate modulator, or cracked pipes leading to it, AAP sensor, I'm assuming you have checked most of these.

The thing you could try is go back to the standard mapping and do a couple of tanks to see if it is the upgrade.

EDIT; what about the turbo, have you shortened the rod to increase the flow now that the centre muffler, EGR and upgrade is done!!

Oh yeah and the intercooler hoses have you checked them?

Baz.

Originally Posted by Redback

Could there be a problem with the auto maybe causing drag, just serviced the auto fluid (no thanks to an inner city LR dealership that should have done it at 160thou! or a blocked thingy in the airbox (you know that twirly thing) been there, checked that. wastegate modulator im getting 1.25bar so im assuming its working, or cracked pipes leading to it, AAP sensor its reading right as far as i can tell, i dont want to change it as a guess, it costs way to much for what it is!, I'm assuming you have checked most of these. yep.

The thing you could try is go back to the standard mapping and do a couple of tanks to see if it is the upgrade. as i said in my post, i have 1L/100 better economy with the upgrade in, and a standard D2 shouldnt get 16L/100 anyway

EDIT; what about the turbo, have you shortened the rod to increase the flow now that the centre muffler , EGR and upgrade is done!!yep done that

Oh yeah and the intercooler hoses have you checked them? not on the inside, but my boost pressure remains steady under the same conditions.

Baz.

this is why i ask, as i have done most of the usuall fixes

cheers phil

dodgy fuel gauge/sender??? giving spurious readings?
sorry best i got

i know mine is manual but even if i flog it i still get worst 11ltr/100km mixed driving.

cheers
liam

Originally Posted by Yorkie

dodgy fuel gauge/sender??? giving spurious readings?
sorry best i got

i know mine is manual but even if i flog it i still get worst 11ltr/100km mixed driving.

cheers
liam

i use a log book

cheers phil

Hi
Is the Auto going into torque converter lock up. your problem could be with the auto

Phil

Are you running bigger tyres?

Is the Odo 100% correct?

Are you using a GPS for km's travelled ?

Have you tried changing gears BEFORE 5 grand?