poor MPG STILL... after changing so many parts

[scopes]

To be honest... thats probably about right. I did a 2 hr journey a few nights ago. 3 people in the car and full boot. Avg. speed about the same as yours with a few booting sessions... and it did 26MPG.

this was with just me in the car and no luggage.

Just after it was mapped by r-tech it was comfortably getting 28-30mpg at those kind of speeds

Did you try resetting it, jedi?

[jedi-knight83]

ok, if you have access to vcds could you log block 032 for your fuel trim. You don't need to start the car to log this block.

Also did you do a basic setting for the Intake Manifold Runner?

Im away in the van working this week but i'll log that when i get home at the weekend. Is it just a single number then? not something you need to log while out on a run?

Also im not sure about the manifold runner setting. I'll ask the garage that did the work but I can also do this when I get home with vagcom.

thanks for the advice.

[jedi-knight83]

To be honest... thats probably about right. I did a 2 hr journey a few nights ago. 3 people in the car and full boot. Avg. speed about the same as yours with a few booting sessions... and it did 26MPG.

this was with just me in the car and no luggage.

Just after it was mapped by r-tech it was comfortably getting 28-30mpg at those kind of speeds

Did you try resetting it, jedi?

Hi, not since you posted as I'm away in the van... but thinking about it i did actually reset my mpg on the move on sunday. I normally have it on the one that resets every time you get in the car but when it was getting such low mpg i switched it to the other memory and reset that while i was driving. When i got home the memory that i had reset on the move was 25.5 and the memory that had been recording mpg since i started the journey was 24.8

I dont think its computer reset issue as i'm often resetting it tbh to see what the current mpg is....

Other symptoms of the possible over fuelling include getting through a full tank of vpower in 280 miles and a very sooty exhaust pipe after just a short drive.

[scopes]

Try you MAF, maybe just give it a clean before buying a new one 

[jedi-knight83]

Try you MAF, maybe just give it a clean before buying a new one 

I cleaned it a few months ago when I was having issues with my itg air intake but I'll try it again. NOTE... im back on the OEM air intake now with a pipercross panel filter but I had this when i was also getting good mpg

[scopes]

Could just be the colder weather now, as a few have said above... Hard time of the year to test this...

 

[bacillus]

ok, if you have access to vcds could you log block 032 for your fuel trim. You don't need to start the car to log this block.

Also did you do a basic setting for the Intake Manifold Runner?

Im away in the van working this week but i'll log that when i get home at the weekend. Is it just a single number then? not something you need to log while out on a run?

Also im not sure about the manifold runner setting. I'll ask the garage that did the work but I can also do this when I get home with vagcom.

thanks for the advice.

There are two values for the fuel trim and doesn't require you to go for a run.
The first field tells the fuel trim at idle and the second field tells the fuel trim at elevated engine speeds.
Negative values indicate that the engine is running too rich and oxygen sensor control is therefore making it more lean by reducing the amount of time that the injectors are open.
Positive values indicate that the engine is running too lean and oxygen sensor control is therefore making it richer by increasing the amount of time that the injectors are open.
Specifications for normal operation are usually somewhere near +/- 10%.

[Top Cat]

Hasn't H4rdy just accidentally solved his long term low mpg problem by accident.  I can't remember the thread or what was the problem. Give him a PM. 

[bacillus]

Hasn't H4rdy just accidentally solved his long term low mpg problem by accident.  I can't remember the thread or what was the problem. Give him a PM. 

Wrong rail pressure sensor.
http://www.mk5golfgti.co.uk/forum/index.php/topic,51751.msg619905.html#msg619905

[Black9]

I have to say both my GTIs get pretty poor MPG. Never get higher than 22-24 mpg in town in my mapped ed30. Used to get around 25-27 in my K03 GTI. Makes jus wanna buy a V8

[jedi-knight83]

Ok. Just performed a basic setting. Will see if that changes anything

Also happy to report there were no new fault codes :)

I checked the fuel trims on block 32 aswell


I think that's a bit outside the recommended 10%?


Sent from my iPhone using Tapatalk

[h4rdy]

I get 38mpg on a 45 minute run to work keeping at speed limits with the odd overtake.

Stage 2+.

Just a note, I changed some MAP settings the other day as I like to play, 6-2-9, where the 2 is richer and the economy dropped right off.

I suggest your MAP is running on the safe side?

I am back to 9-6-9 et voila 38mpg again.

Have you tried it with the MAP turned off?

That would be the crux of it.

Can you do that?

[rich83]

38MPG.. thats insane... ive never seen higher than 35... usually 25! 

[bacillus]

Ok. Just performed a basic setting. Will see if that changes anything

Also happy to report there were no new fault codes :)

I checked the fuel trims on block 32 aswell


I think that's a bit outside the recommended 10%?

Whose map are you running and with what intake?

[jedi-knight83]

I get 38mpg on a 45 minute run to work keeping at speed limits with the odd overtake.

Stage 2+.

Just a note, I changed some MAP settings the other day as I like to play, 6-2-9, where the 2 is richer and the economy dropped right off.

I suggest your MAP is running on the safe side?

I am back to 9-6-9 et voila 38mpg again.

Have you tried it with the MAP turned off?

That would be the crux of it.

Can you do that?

not sure what all those numbers are. Guessing its a revo setting?

I cant turn my map off myself.