MPG - 1.9 TDI AVF 4motion - 6speed manuall

[Feinstaub_CH]

Hi all

What is your MPG on this type of Car? I got 32mpg, i would expect more like 40ish

I've got around 32mpg with normal driving, 80mph on highway, 55mph on outside city and 35mph in city. I am WOT until I got my speed, then I shift to the 5th or 6th gear.

Before i forgot, on MB013 i have a -1.5 - 2.0mg on PD-Unit 2 and 4. Can this be a sign that this units are off?

MPG - 1.9 TDI AVF 4motion - 6speed manuall
Car has 210k miles, all original.

Many thanks
Feinstaub

 

[tikal]

I have a Wagon five speed manual (EEN gearbox). I average around 35-36 MPG in the city (short drives to work) and around 40 MPG in the highway @ 75 MPH. Michelin MXV4 tires inflated 44 psi rear and 42 psi front.

 

[imo000]

Constantly driving 4 wheels costs energy so the AWD version will alway use more fuel and will put less horsepower to the ground. All other things beeing equal ofcourse. Also, doing WOT acceleration cost a lot of fuel too.

 

[Feinstaub_CH]

Constantly driving 4 wheels costs energy so the AWD version will alway use more fuel and will put less horsepower to the ground. All other things beeing equal ofcourse. Also, doing WOT acceleration cost a lot of fuel too.

I agree but still, 32 mpg on highway is too much for my opinion.
MB13 is showing, Cyl1. 1.11, Cyl2. 0.42, Cyl3. 0.94, Cyl4. -2.52






Nothing personal but i don't agree with this statement, with WOT i need a couple of seconds and i'm on my speed with 5th or 6th gear. With not less throttle i need way longer to get to my speed. So the question is what consumes more fuel, WOT vs less time or less throttle vs longer time to speed up?


Regards
Feinstaub

 

[JimsR6]

Why not try using less pedal as your own experiment. Unless you already have and this is why you disagree that WOT kills your fuel mileage.
Try a few tanks of pretending there's an egg under your fuel pedal and post your findings.
You mpg does seem very low for highway driving.

 

[Feinstaub_CH]

Thanks JimsR6

I did it over 2k miles. My father did also drive the car for about 500 miles, same thing, and he's the opposite of me.

I am pretty sure my nozzles are off, but i don't want to jump to conclusions without having your feedback's, especially when I have this Readings in group 013: Cyl1. 1.11, Cyl2. 0.42, Cyl3. 0.94, Cyl4. -2.52

Again, I appreciate your feedback's

And yes, i drove several different cars this way's:
Volvo D5 205horses 4wd, Automatic - about 25mpg
Skoda octavia, 1.9 TDI, chipped to 170 horses, about 44 mpg
Renault Clio, 1.5 dci, stock, about 47 mpg

Because of that i am assuming that the Passat is taking to much fuel. Its a Caravan.


Regards
Feinstaub

 

[JimsR6]

It seems as tho your on to something there. You could try pulling the injectors and cleaning the nozzles. Another possibility is a clogged up intake. Not sure if your engine is as prone to that as my AHU.

 

[otty]

I have pretty well the same car. See my fuelly in my sig.

Edit: So I get little over 33mpg but note that this is with about 75% city driving at around 50km/h (31mph). I can easily get 40-45pmg all highway.

 

[imo000]

People usually don't drive as far as we do in Noryh America so their highway distances are usually shortet and the city driving is a lot more. Everything is also a lot closer so engines might not get warm for most of the city driving. All this with an AWD Passat Wagon probably why a good running car would get much less Kms on a tank of fuel. I was born over there so this is not a guess.

 

[Feinstaub_CH]

I agree with you imo000 but

One way to my workplace is 22miles, 10miles are city speed but no stop and go, the rest is outside city - 50 miles per hours.

With my tuned Octavia i was able to have a 3.x l/km (above 55mpg) on the Bord computer when driving "easy" to work, other vice its about 4.x.

Of that I am assuming that my mpg of 32 mpg is too low.

Let me ask this way, with the measurement of Group 013 on Vag Com:
Cyl1. 1.11, Cyl2. 0.42, Cyl3. 0.94, Cyl4. -2.52 I am assuming that my nozzles are worn out, they are sure for a test. I also will check if intake is clogged or not but still I think due to the measurement of Group 013 my nozzles are causing this low MPG - what do you think?


Many thanks!
Feinstaub

 

[Feinstaub_CH]

update:

Did a nozzle's recalibratino, pre-tension was recalibratet do 225°. The engine purrs?! like a cat not.

After heating the engine up over 80°C here are the Block 013 measurements.

Average on each Cyl and Deviation.
What do you think?
Average of Cyl 1 StdDev of Cyl 1 Average of Cyl 2 StdDev of Cyl 2 Average of Cyl 3 StdDev of Cyl 3 Average of Cyl 4 StdDev of Cyl 4 0.79 0.06 -0.02 0.05 0.59 0.06 -1.39 0.07
Many thanks
Feinstaub

 

[Feinstaub_CH]

Average of Cyl 1 StdDev of Cyl 1 0.79 0.06

Average of Cyl 2 StdDev of Cyl 2 -0.02 0.05

Average of Cyl 3 StdDev of Cyl 3 0.59 0.06

Average of Cyl 4 StdDev of Cyl 4 -1.39 0.07

 

[nicklockard]

update:

Did a nozzle's recalibratino, pre-tension was recalibratet do 225°. The engine purrs?! like a cat not.

After heating the engine up over 80°C here are the Block 013 measurements.

Average on each Cyl and Deviation.
What do you think?
Average of Cyl 1 StdDev of Cyl 1 Average of Cyl 2 StdDev of Cyl 2 Average of Cyl 3 StdDev of Cyl 3 Average of Cyl 4 StdDev of Cyl 4 0.79 0.06 -0.02 0.05 0.59 0.06 -1.39 0.07
Many thanks
Feinstaub

What is your engine's operating temperature (coolant T) after steady-state? Fuel economy is strongly dependent upon operating temperature.

 

[Feinstaub_CH]

What is your engine's operating temperature (coolant T) after steady-state? Fuel economy is strongly dependent upon operating temperature.

Hi nicklockard

As i wrote, my temperature was over 80° Celsius or 176 °F


Regards
Feinstaub

 

[nicklockard]

Hi nicklockard

As i wrote, my temperature was over 80° Celsius or 176 °F


Regards
Feinstaub

That could be the main source of low fuel economy. Change it to a 90 Celsius thermostat, and you will probably see 5%-8% better FE.

80 Celsius seems very low for a 4 cylinder VAG Tdi engine.

 

[Feinstaub_CH]

That could be the main source of low fuel economy. Change it to a 90 Celsius thermostat, and you will probably see 5%-8% better FE.
80 Celsius seems very low for a 4 cylinder VAG Tdi engine.

Thanks fo the heads up!

Am i assuming right, with normal driving, the engine twmparature should be around 90deg and not 80deg. Because, in my situarion, only when i do a couple of WOT ig gets to and over 90deg.

 

[nicklockard]

I tried to look up the AFV engine code specifically, but I could not find that specific information. I just know the similar VAG Tdi engines such as AHU, AZZ, ALH run on 90C.

 

[Feinstaub_CH]

I tried to look up the AFV engine code specifically, but I could not find that specific information. I just know the similar VAG Tdi engines such as AHU, AZZ, ALH run on 90C.

Thanks for looking

Went to work today, around 35km one way but WITHOUT logging operating temperature.

Fact is that the car does need a long time to get to "operating" temperature, and once i'm in the highest gear, the temp drops slightly below the middle. Will try this days to block half of the front cooler, to see if the temp gets faster and also to monitor mpg.

BTW - MPG looks far better now, this is just an indicator. Once I re-fill i'll know exactly what the consumption was.

Keep you posted and once more thanks for your all heads ups!

 

[Feinstaub_CH]

Update: well, its not as i hoped, consumption is still very high, about 8 litres per 100km. Tomorrow i'll go to do a check the pd elements and perhaps to change the nozzles.

And YES, MAF is checked, it shows in 3rd gear and WOT over 1000mg and it correlates with the turbine pressure


Keep you posted.

 

[Feinstaub_CH]

Update: Elements will be back tomorrow, 2 with new nozzles and 2 are overhauled.

Keep you posted.

 

[nicklockard]

Blocking the radiator is not as effective as changing the thermostat, sometimes.

 

[Feinstaub_CH]

Blocking the radiator is not as effective as changing the thermostat, sometimes.

I changed a couple of thermostats, i think I'll have to buy a new 90° one.

 

[otty]

I tried to look up the AFV engine code specifically, but I could not find that specific information. I just know the similar VAG Tdi engines such as AHU, AZZ, ALH run on 90C.

My AVF engine runs at 90c or even a little higher...

 

[Feinstaub_CH]

My AVF engine runs at 90c or even a little higher...

Thanks otty. The stated consumption of 4.5 - 5.5L is that correlated with the Passat or the Jetta?


Thanks
Feinstaub

 

[otty]

The Fuelly in my signature shows an average of 7.1l/100km as I stated earlier in this thread. You can click the fuelly for details. This is mostly city driving. All highway driving at 100km/h and I can easily get 5l/100km. The 4motion does clearly guzzle a lot more fuel!

The Jetta gets about 4.5-5.5l/100km average.

 

[Feinstaub_CH]

The Fuelly in my signature shows an average of 7.1l/100km as I stated earlier in this thread. You can click the fuelly for details. This is mostly city driving. All highway driving at 100km/h and I can easily get 5l/1200km. The 4motion does clearly guzzle a lot more fuel!

The Jetta gets about 4.5-5.5l/100km average.

Sorry, dind't saw it earlier. I like to hear that the AWD is taking about 5.x on highway, I do now have a spec limit.

Yey, and yes, nozzles are back in the engine, did today my first drive. Now again its to fill up the car and to measure the consumption.

 

[Feinstaub_CH]

Sorry, dind't saw it earlier. I like to hear that the AWD is taking about 5.x on highway, I do now have a spec limit.
Yey, and yes, nozzles are back in the engine, did today my first drive. Now again its to fill up the car and to measure the consumption.

Update: MPG is now about 36.5 - 37.0 on 10miles city and 10miles highway driving.

 

[Feinstaub_CH]

update:

Did changed the Thermostat today with a new one. Had troubles to get to working temperature on cold weather around 0° C and I found out that the "old" Thermo had a little hole in it - no wonder i have troubles to get to temperature.

Lets drive the rest of the reservoir empty and see what MPG i'll get.


Keep you posted
Feinstaub

 

[Feinstaub_CH]

I'm up to 32 MPG from 29 MPG - still have to drive the reservoir empty - but its a good indicator!


Keep you posted

 

[Feinstaub_CH]

My joy on the previous posts where obsolete - my MPG still sucked - 29 MPG BUT

After changing the G62 sensor - holy moly - its like my car is running on air. I have no clue how much the car consumes right now but it looks like 40+ MPG which is AWSOME!

Long Story short - it looks like G62 was the bad actor


Regards
Feinstaub