Custom code remap poor mpg?

[VINNYVRS]

Hi guys my vrs has a custom code phase remap with forge 007 and green panel filter and im not happy with the mpg i know its been mapped but they claim there remap improves mpg?

before the remap i was getting low 30s i even got high 30s on a run now im struggling to get 25mpg thats on a run? surely this cant be right?

[RichB86]

lol, a remap on a petrol car imo will never increase mpg imo.

25 does seem low but its all about driving style, i can get 17mpg or 32 it depends on roads speed and planning.

[martziniuk]

That seems very low.

Is that by the computer or worked out properly?

[W-TRON]

On a Vrs with A CC Phase 1 Generic I used to always get about 28/30 but on Shell Opitmax....

Lower grades fuel were getting 25mpg but never lower!!!!.

On mixed driving

[VINNYVRS]

the car was getting mid 30s before the remap custom code have told me 25 is very low and its probaly a faulty sensor what i cant understand is it was fine before the remap?

[VINNYVRS]

now the car is idiling lumpy and its stressing me out big time

[RichB86]

now the car is idiling lumpy and its stressing me out big time

Go get the error codes read and see if there is anything else that can be affecting it. it could be purely coincidence or it could be the maps not working on your car.

[shark_90]

Could be a knackered lambda probe too.

[Wardy]

On a decent steady run, I'd expect a stage-1 remapped vehicle to return better figures. And for each remapped car I've had this has been the case. I saw 38 in convoy to Gaydon from Manchester the other week, largely at 70-75.

I'd run a VAG-COM scan there and see if anything comes back.

Steve

[VINNYVRS]

been on vag com no faults found i have checked all the boost hoses vac hoses there fine so somethings a miss somewhere hopefully getting it back to cc today

[VINNYVRS]

i have been told i have to give it a few days for the remap to settle down and let the ecu relearn also that the trip isnt accurate after a map?

do the words fobbed off come to mind?

[mannyo]

The trip is as accurate after a remap, as it was before.

The ECU thing may ring true, although it shouldnt take to long to relearn itself, maybe 1/2 tank of fuel.

If you do a search on here for custom code, you will find differing results, including at least one member who had major boost issues.

http://briskoda.net/octavia-i/custom-code-remap-whats-your-figures/125572/

I had my old mk1 vRS remapped by jabbasport and saw an improvement in MPG if driven normally, however and obviously when booting it MPG was a lot less.

Edited 21 July, 2009 by mannyo

[Guest westallc]

sounds like maf to me;)

[VINNYVRS]

cleaned the maf last night and the car pulls like a train now th empg has risen aswell

[Nick P]

yay, good stuff

[VINNYVRS]

aaaaaaaaaaaaaaaarrrrrrrrrrrrrrrrrgggggggggggghhhhhhhhhhhhhhhh

back down to 24.7 mpg drove the car this morning and it feels like it did before i cleaned the maf :(

do i bite the bullet and buy a new maf?

[MoggyTech]

aaaaaaaaaaaaaaaarrrrrrrrrrrrrrrrrgggggggggggghhhhhhhhhhhhhhhh

back down to 24.7 mpg drove the car this morning and it feels like it did before i cleaned the maf :(

do i bite the bullet and buy a new maf?

Yes.

[AwesomeSarah]

Agree with the above , cleaning is only prolonging the inevitable.....

Or do a check on VAG come to check specified and actual readings on VAG COM

Sarah

[VINNYVRS]

replaced the maf for a brand new one and cant really say i have noticed a difference?

custom code want to charge me to look at the car wich i think is disgusting after i just spent £350 with them ok my car boost well but id expect it to be a rocket doing 24mpg lol

i cant justify paying them to look at it because it was fine before the remap since the map i have bought a temp sender and maf as they advised these could be the problem that put me £120 out of pocket now they want more money to sort it?

[mannyo]

custom code want to charge me to look at the car wich i think is disgusting after i just spent £350 with them ok my car boost well but id expect it to be a rocket doing 24mpg lol

You are not the first person to be unhappy with Custom Code, if you search you willl see what I mean.

[VINNYVRS]

im not happy they told me it wasnt a fault with anything they have done its a hardware problem with my car, and they dont work for free so if i want it sorted i pay the hourly rate and whatever it costs to fix it

what i dont understand is the car ran mint and was superb on fuel before, dont get me wrong it drives so much better but i here so many people say that a remap improves mpg then theres mine lol if you drive it like miss daisy 30mph in 5th everywhere it starts to creep to about 26mpg but that it where as before i were getting 30+ even got 42mpg from a 200 mile steady trip back from brighton dont think i can afford to go there again now lol

[AwesomeSarah]

Hi

No matter what remap you get , it can cause issues with any little minor sensor or underlying fault with the engine

What happens with remaps , is that it requires having the engine in tip top working order

Now as you are getting extra power with a remap any small fault like with the CTS will cause an issue

That is why a check is done before and after the remaps , as then some faults can be detected before you drive off

The main thing is how the problem is resolved....and how you are dealt with afterwards

If you told that this could happen

I try to explain to people who have issues and explain to them what and why it happens

We do try to look after people , but as the map does not change , but the engine parts do....it will probably be a sensor failure

But not happened due to the remap , just brought on a tad earlier

Sarah

[sms]

as mentioned above, howlong ago did you get a remap as it will reset ecu and the ecu will need to learn your driving style again this takes 100-200 miles to kick in, if not by the time you done 400 miles/tank then go back and speak to them.

[VINNYVRS]

had the map done last saturday drove 50 there at 36mpg the same journey home we got 23.1mpg but harder driving following day drove about the same distance steady 60mph with cruise on thats when we struggled to get 25mpg the car has done 100 mile since, no faults were found before and nothings coming up now, im actually thinking of having it put back to standard as now a phase 1 remap has ended up costing me £500

[AwesomeSarah]

Have a check of the CTS , if it is the black one , change it anyway

We have seen them go faulty with no fault codes

Also get the MAF checked and make sure that the actual readings are the same as predicted

All very common issues

Sarah