GOLFMK8
GOLFMK7
GOLFMK6
GOLFMKV

New fuel filter and spark plugs = lower MPGs?

dcpppf

dcpppf

Ready to race!
I replaced my fuel filter and spark plugs a few weeks back and have noticed quite the drop in fuel mileage. ~ 40-50 miles per tank.

I believe the new fuel filter went from 6.4 bar to 6.6 and my new plugs were .028" gapped (APR stage 2 recommendation).

Any reason why such a drastic change in fuel mileage??
 
M

MLue1

Drag Racing Champion
dcpppf said:
I replaced my fuel filter and spark plugs a few weeks back and have noticed quite the drop in fuel mileage. ~ 40-50 miles per tank.

I believe the new fuel filter went from 6.4 bar to 6.6 and my new plugs were .028" gapped (APR stage 2 recommendation).

Any reason why such a drastic change in fuel mileage??
Click to expand...
You need to reset the long and short term fuel trim by reseting the ECU, as the car is still compensating for worn parts.
 
dcpppf

dcpppf

Ready to race!
Hmm, noted. I'll disconnect the battery for a bit tonight when I get home.

Any way to reset the fuel trims with VCDS? Sounds like just clearing fault codes will, but not sure.
 
11gti718

11gti718

Ready to race!
dcpppf said:
Hmm, noted. I'll disconnect the battery for a bit tonight when I get home.

Any way to reset the fuel trims with VCDS? Sounds like just clearing fault codes will, but not sure.
Click to expand...

you probably did it already but clearing VCDS will reset LTFT AND STFT.
 
dcpppf

dcpppf

Ready to race!
Didn't seem to have much of an effect on this mornings commute. But will give it a tank or two before trying something else! thanks for the help everyone.
 
You must log in or register to reply here.
Top