poor mpg

[joe-cupra]

it is a mk3 cupra i drive with a stage 1 remap i am sure i used to get 29/30 mpg
and sinse the cold weather came i have just checked it and reset it and it said 22 mpg
that is town driving by the way. do you lads think there is something up or what?
i have had a search and alot gets said about the MAF? how much are these to buy then? and what els could it be? thank's

 

[tarzan]

pre cat lambda that what it was on mine

 

[joe-cupra]

what else could it be

 

[Sharky_82]

would be best to get it on vag com - my pre cat sensor went as well and improved my mpg as i was getting the same as you. currently getting about 28/29 so still not right - going to change the maf to see if that makes a difference. only changing maf as i havnt got any errors coming up so trying that first

 

[joe-cupra]

rite well every thing else seems to be ok it idles smooth n that i mite just try the per cat sensor as they are only £63 ish.
what else is it likely to be? cheers

 

[turbo009]

New maf your looking at £40-£80 i think if you shop about.

 

[Rick1.8t]

My car is considerably worse on fuel when its cold.

I put it down to cold starts using a lot more fuel and it taking longer for the car to come off choke and for the engine to get upto correct and efficient operating temp.

My car is healthy with a new Maf and new coolant temp sensor - i have noticed this every winter (or cold period) since i have owned the car- My MPG doesnt quite drop that much though so it sounds like there are other problems afoot.

- Get it on vag-com and do some logs or its just guessing - dont waste your money buying parts that could be fine, £63 is not an amount i would like to flutter away on guesswork.

Rick

 

[antnee]

I get an average of 20mpg around town!

 

[Reuvers]

its normal that a car will use more fuel in the winter period. Like said above, the car is using auto choke until its up to temp, but in the meantime its using more fuel. Plus, not all fuel is getting burnt as well as it would do when on proper temp.

However with the MPG stuff I can't get an accurate idea of what you mean, as I work with liters and km's. However, it looks like yours went down quite a bit which will make me think that something else is up.
I can see my average consumption go up by a bit now that its getting colder, but its only like 5 to 10% max more consumption than in summer.

like said get it on vagcom.
You could try unplugging maf to see if it runs better, however don't know if a buggered maf will really make you run rich.
Temp sensor maybe?

 

[joe-cupra]

thanks every one for the answers i have reset it and i am now getting 30-33 MPG
i have reallised why it was so low and that is because the other day i left my car tiking over for quite some time. thanks again

 

[Imperial_dan]

thanks every one for the answers i have reset it and i am now getting 30-33 MPG
i have reallised why it was so low and that is because the other day i left my car tiking over for quite some time. thanks again

what needs re-setting and how do i do it?! im new to this cupra stuff but my mpg is sh*te!!

 

[Reuvers]

thanks every one for the answers i have reset it and i am now getting 30-33 MPG
i have reallised why it was so low and that is because the other day i left my car tiking over for quite some time. thanks again

and what does "leaving your car tiking for quite some time" have anything to do with poor fuel consumption?