All Things Mk5 > How to Guides / Troubleshooting
Extremely Poor MPG
bacillus:
--- Quote from: GLIDN on December 01, 2013, 09:34:42 am ---
--- Quote from: bacillus on November 30, 2013, 10:24:44 pm ---What are your fuel trims (block 032 and you don't need to start the car to run the measuring block)?
--- End quote ---
Group 32 (in engine)
Shows Lambda Regulation
Block 1 Block 2
-2.8% (idle) 9.8% (partial)
--- End quote ---
Long term trim could be lower but supposedly in the ok range (<10%). What intake are you using?
When logging, did you look at actual and requested lambda?
Whose map are you running?
As for your temp, you will use more fuel if you don't come up to the 90C mark asap.
GLIDN:
--- Quote from: bacillus on December 01, 2013, 10:28:48 am ---
--- Quote from: GLIDN on December 01, 2013, 09:34:42 am ---
--- Quote from: bacillus on November 30, 2013, 10:24:44 pm ---What are your fuel trims (block 032 and you don't need to start the car to run the measuring block)?
--- End quote ---
Group 32 (in engine)
Shows Lambda Regulation
Block 1 Block 2
-2.8% (idle) 9.8% (partial)
--- End quote ---
Long term trim could be lower but supposedly in the ok range (<10%). What intake are you using?
When logging, did you look at actual and requested lambda?
Whose map are you running?
As for your temp, you will use more fuel if you don't come up to the 90C mark asap.
--- End quote ---
It's APR tuned. I own 2 mk5 DSG gti's and both are Stage 2+ also both on APR software.
Been for around 12 months.
Only difference in our cars is hers has the AXX engine, mine is BWA.
Like I stated earlier. I was running stock intake, then tried stock Golf R intake and now on VWR intake.
No change in figures or fuel consumption.
As for earlier regarding time taken. If car has been started from cold then only on idle. Car takes approx 10-15 minutes to warm up. If started from stone cold and driven, car is up to 90 within 3 Km's.
I have a new coolant temp sensor arriving tomorrow. So will install that.
But only 30 minutes ago. I have re-installed original front PCV and MAF.
Will do some more data logging in the few days and post up the information.
mark c:
My off side rear caliper had seized killing my mpg for a few months until it was picked up on a routine service and MOT
GLIDN:
Well strangely enough.
Got a chance to drive the car tonight. Managed 12.8km/l on the highway.
Still not as good as 13.9-14.4km/L. But a hell of an improvement none the less.
I have not yet swapped out the coolant temp sensor either.
I will keep everyone posted in the next few days.
But appears like I may have been supplied a faulty MAF.
Never seen a car go into crazy rich with faulty MAF. Usually just safety MAP
bacillus:
If you think the maf is faulty, disconnect it and see if things are any better.
You'll have to disregard the CEL if you do disconnect it and drive.
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