Innacurate computer fabia vrs

[glynnd]

Hi all

Can anybody help with this.

My computer is redaing 62.2 but have calculated from brim back to brim 49.8.

I can see that some of you are getting innacurate readings, but is this a known problem (fuel sensor renewal) that can be sorted or is it a live with it problem?

I have had fab vrs' before as trade demo (04/05) cars and never seen this problem on any of them.

Any help welcomed

Glynn

[Robbie 88]

mine is reading the other way the car is saying it is getting 52.5mpg but ive calculated its getting 62.6mpg... and its an 04 reg...

[Gti Fly]

I believe there is a way of re-calibrating the Trip computer by using VagCom.

I remember reading about it via doin a search on this forum

(my trip computer is about 10% out. indicated 50mpg is actually 55+mpg on a full tank to empty method)

[Babs]

Mine always read 55+ MPG, but always averged 40MPG calculated...

[ric04vrs]

the earlier cars were always a lot more accurate than the later ones, no idea why that is though

[vRS G60]

Indicated 62 ish reallity 55-56 ish

[fabia vrs mark]

i get an indicated 50 mpg and calculated 45. mainly town driving.

[JulieD]

Ours is the same - computer claims 65mpg whereas it's just over 50mpg in reality (2006 vRS). The dealer said there's nothing that they can do about it, so I guess it's just one of those things we'll have to live with. Our last Fabia's computer was spot on (2001 TDi)!

[Bezzy]

just figured mine out for one tank based on the receipt I found. Computer said 53.1 to the gallon, I figured out 50.4! This makes me cry! I thought I was doing really well! However, to be fair, the claimed mpg figures for my old car said 38 mpg combined, and I'd be suprised if I EVER got anywhere near that, and yes, it was completely standard!

[JFReturns]

Mine normally shows an average of 75mpg, actual is 58. Bit gutted at first, but it is still very economical consider the grunt available

[mannyo]

All trip computers on all makes/models are inaccurate, some more than others though. The reason being, there are to many variables to consider when the software makes the calculations. Fuel flow, throttle position, road gradient, engine rpm an so on. Added into this,you have the fuel that gets returned to the tank on the overrun and you can see why they are innacurate.

[JFReturns]

@ Mannyo - if that is the case, why are the earlier cars more accurate?

[mannyo]

They just changed the the way the software calculates the figure. I guess so it looks better to the driver than it really is.

[glynnd]

Fair enough on the explanations.

How does my 04 leon tdi cupra manage to get within 1.5 mpg of the computer though?

Glynn