theraven Posted September 30, 2008 Report Share Posted September 30, 2008 hi all been reading previus posts on petrol, my computer goes up and down and never reads more than 17 mpg???? is there a surefire way to set and find outmy true mpg.....?? should be a bit better than 17 i wouldhave thought!!!! theraven Link to comment Share on other sites More sharing options...
Wayne'o Posted September 30, 2008 Report Share Posted September 30, 2008 mines reads 26.4 mpg but that also includes the person driving it before me i would like to know how to reset it Link to comment Share on other sites More sharing options...
MattBMW Posted September 30, 2008 Report Share Posted September 30, 2008 I would be nice to know how to reset it Link to comment Share on other sites More sharing options...
Sam Posted September 30, 2008 Report Share Posted September 30, 2008 just hold the button down. Link to comment Share on other sites More sharing options...
theraven Posted September 30, 2008 Author Report Share Posted September 30, 2008 mines reads 26.4 mpg but that also includes the person driving it before me i would like to know how to reset it hi wayne in the service manual it says to hold button in on indicater arm tryed that but the mpg still goes up and down??? raven Link to comment Share on other sites More sharing options...
DonB Posted September 30, 2008 Report Share Posted September 30, 2008 When the obc is set to the mpg readng, simply hold in the button on the indicator stalk and it will reset the reading and you'll see _ _ . _ on the display for a second. Link to comment Share on other sites More sharing options...
theraven Posted September 30, 2008 Author Report Share Posted September 30, 2008 When the obc is set to the mpg readng, simply hold in the button on the indicator stalk and it will reset the reading and you'll see _ _ . _ on the display for a second. hi don thx mate tryed that but get between 12 and 17 but never stays on certain figure? and noticed that petrol light comes on half between first qu mark?? nowhere near empty raven Link to comment Share on other sites More sharing options...
simonlpearce Posted September 30, 2008 Report Share Posted September 30, 2008 17.6 sounds a little low for a 323, you may have a problem with your MAF or something similar. Have you noticed the car running rich at all or excessive smoke? It could as you say also be something to do with the trip. Link to comment Share on other sites More sharing options...
Sam Posted September 30, 2008 Report Share Posted September 30, 2008 its an average, so for the first few miles its going to yoyo alot. or does it keep changing after hundreds? Sure its not on current MPG? Link to comment Share on other sites More sharing options...
theraven Posted September 30, 2008 Author Report Share Posted September 30, 2008 its an average, so for the first few miles its going to yoyo alot. or does it keep changing after hundreds? Sure its not on current MPG? hi it changes all the time theres no smoke etc seems to run nice i,ve reset a few times but no joy also the mpg oon the dash (needle) goes from 1 side to the othernever stabilzed raven Link to comment Share on other sites More sharing options...
Stu Posted September 30, 2008 Report Share Posted September 30, 2008 My 323 manual is always averaging around 31-32mpg, with climate control on I get more when I go on a run, and I dont drive like a granddad either. Mine has been re-mapped though which improves fuel consumption. Link to comment Share on other sites More sharing options...
SJD Posted September 30, 2008 Report Share Posted September 30, 2008 It will change when your driving. What does it read once you've stopped? I always re-set mine when I fill up. Although on my obc of the clubsport I can run current mpg and overall mpg readings so I have one for the current tank and one in my lifetime with the car. I guess a lot will depend on auto v manual and what type of driving you do too. My wife's 318i only beat mine by .5 mpg if you compare the last tankful of each car! The swingmeter/econometer is a pretty useless feature IMHO - it just relates to how hard your pressing the loud pedal! The only true way of knowing your mpg is a brim-to-brim test. Link to comment Share on other sites More sharing options...
shs213 Posted September 30, 2008 Report Share Posted September 30, 2008 I got a 318 steptronic auto, mine does about 24 - 25 mpg inside London city. . Reading that a 323 does 31 MPG, I should be doing more. . Having said that i can't remember what MPG I do on a motorway. . Raven, the otherway to do a sense check of your MPG is fill up about 30 liters (that's 6 Gallons), re-set your meter. . Check how many miles you do with 30L gas, divide by 6 which will give you MPG, if the answer is way out compared to the meter, then you got a faulty meter. . Link to comment Share on other sites More sharing options...
SJD Posted September 30, 2008 Report Share Posted September 30, 2008 I got a 318 steptronic auto, mine does about 24 - 25 mpg inside London city. . About right, sorry to say. Thanks to the school run ours did 23.5 last time round! Link to comment Share on other sites More sharing options...
theraven Posted September 30, 2008 Author Report Share Posted September 30, 2008 About right, sorry to say. Thanks to the school run ours did 23.5 last time round! hi lads just been few a few mile run and it seems to have settled on 28.8 miles and it is a 323i auto so lets see if thats about right raven Link to comment Share on other sites More sharing options...
Sam Posted September 30, 2008 Report Share Posted September 30, 2008 we averages 31.3mpg on our 323Ci. This was all sorts of driving. It was also reset on a trip to south of france and back, and it was 31.7mpg when we got back. Link to comment Share on other sites More sharing options...
theraven Posted September 30, 2008 Author Report Share Posted September 30, 2008 we averages 31.3mpg on our 323Ci. This was all sorts of driving. It was also reset on a trip to south of france and back, and it was 31.7mpg when we got back. hi lads my petrol gauge seems to go down quick are all bm,s like this as put a pony in sunday(25) clocked up about 70 miles now its not far the light coming on (it conmes on about half way between empty and first quarter thx raven Link to comment Share on other sites More sharing options...
Robmgti Posted September 30, 2008 Report Share Posted September 30, 2008 34.1 :lol: Link to comment Share on other sites More sharing options...
theraven Posted September 30, 2008 Author Report Share Posted September 30, 2008 34.1 :lol: what things can i check to make sure petrol related things are all 100% raven Link to comment Share on other sites More sharing options...
Robmgti Posted September 30, 2008 Report Share Posted September 30, 2008 I would start with a simple emissions test at a garage - any number of factors could be causing it: Worn Spark Plugs Exhaust/Manifold Leaks Overfueling - though obviously this should be sorted by the ECU Faulty 02 Sensor (or any of the other 26ish sensors in the engine!) Incorrect Tyre Pressures Rob Link to comment Share on other sites More sharing options...
Dirty Tool Posted September 30, 2008 Report Share Posted September 30, 2008 i average 26.1 (man 328) which is a good combination of bombing up the north circular...and sitting in traffic on the way back on the north circular! ...and thats with dodgy cam sensors. Link to comment Share on other sites More sharing options...
MattBMW Posted September 30, 2008 Report Share Posted September 30, 2008 I get about 26 too.......when you getting the sensors sorted Phill? Link to comment Share on other sites More sharing options...
Dirty Tool Posted October 2, 2008 Report Share Posted October 2, 2008 I get about 26 too.......when you getting the sensors sorted Phill? Ordered them from GSF...picking them up in the next few days Link to comment Share on other sites More sharing options...
Wayne'o Posted October 2, 2008 Report Share Posted October 2, 2008 i'll reset mine raven and keep you posted Link to comment Share on other sites More sharing options...
theraven Posted October 3, 2008 Author Report Share Posted October 3, 2008 i'll reset mine raven and keep you posted cheers wayne,o i,ve changed whats possible at the mpg is quite bad gauge needle seems to go down REALLY quick raven Link to comment Share on other sites More sharing options...
