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Author Topic: Terrible fuel consumption  (Read 1559 times)

Offline MKVASMR

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Terrible fuel consumption
« on: July 14, 2024, 12:13:53 pm »
Hi guys!
Wanted to ask you if anyone could point me in the right direction. Basically the most I can get out of a full tank is around 240miles when I baby it.
So far I changed and checked pretty much everything on the car. Yesterday did a smoke test and had no issues. Car runs fine and has stage 1 on it with around 240hp. Maf is new. Anyone have an idea how to check and determine the o2 sensors function?

Offline MKVASMR

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Re: Terrible fuel consumption
« Reply #1 on: July 24, 2024, 07:09:42 pm »
Bump!
I looked at the fuel trims. I get two values at block 32. Value 1: -1.3% and Value 2: 5.1%.
I did a smoke test hooking up the smoke machine on the intake. Haven’t had any leaks. Car goes well. The calipers are not sticking. What are the other possible causes? I have a new DV and PCV. I get an occasional p0441 code. Did a N80 test and got this


New tyres all around and I did an alignment. Car perfectly straight.

Offline pudding

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Re: Terrible fuel consumption
« Reply #2 on: July 26, 2024, 07:24:33 pm »
-11% fuel trim at idle is substantial.  Should be closer to zero.  What brand of MAF did you fit?  Aftermarket intake?


2007 ED30 | 2009 TDI 140 | 2016 BMW 330D

Offline MKVASMR

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Re: Terrible fuel consumption
« Reply #3 on: July 28, 2024, 12:30:55 am »
The -11 is at the n80 test on basic settings 70.
Not sure what does this mean on the picture.
The real values are up above from the channel 32.
Just fitted a Ramair intake and the MAF I fitted was from Hitachi. There wasn’t a difference before.
« Last Edit: July 28, 2024, 12:35:52 am by MKVASMR »

Offline MKVASMR

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Re: Terrible fuel consumption
« Reply #4 on: August 30, 2024, 12:16:09 pm »
Bump!
Could this be caused by a bad HPFP? My oil smells like petrol. The oil level is not rising though.