Mileage

[VWRacer]

No roof bars on mine. But yes, the 1.6TD does pull the Q-ship nicely.

[Mark(The Miser)UK]

No roof bars on mine. But yes, the 1.6TD does pull the Q-ship nicely.

 :idea: If it's the estate (er wagon) then the factory fitted roof bars will fit on... The internal double skin is pre drilled for the bolts and the outer skin can be drilled from inside the car. Look out for some on a dead 'Q'.
seal mounting flange with a little roofing mastic which stays plastic. :idea:

[farkman]

I've been getting between 41.7 and 44.2 US mpg (~5.3-5.6 L/100km) in my 94 Golf during the winter. I drive about 80% highway 20% city.

[VWRacer]

Mine's a sedan (we don't say saloon - that means "pub" here... ), but I'll keep my eyes peeled. Thanks for the tip!

[srivett]

I get low 6.x litres / 100 km consitently delivering pizza.  I've gotten below 6 litres / 100 before but not lately.  There always seems to be a black fog following me around lately too, that cant' be good for mileage.   :lol: I'm going through the timing belt fiasco next month so I'll try to tune her a bit better then.

Steve

[dieseltech]

Maybe your injectors are dribbling...

My Quantum does 36mpg on the mile city run and 50mpg on the interstate at about 70mph allmpgs in US gal equiv.

Stan what do you get in your 'Q'?

I get mid-40's in combined city-highway driving, so my guess is that it would break down about like yours, Mark.

Ah Quantum driving; so much better than hopping around in Rabbits. It gives the diesel something to pull rather than having it attached to a paper bag  :twisted:

Stan do you have those roof bars as well? I've had 200kg of scaffolding tubes on mine. (Like to see a Jetta carry that)  :twisted:

yea but the paper bag goes like hell when tuned up properly.  the Q ship is a nice ride over the road, just not sporty enough sometimes. plus they are great in the snow.

[Mark(The Miser)UK]

[
Ah Quantum driving; so much better than hopping around in Rabbits. It gives the diesel something to pull rather than having it attached to a paper bag  :twisted:



yea but the paper bag goes like hell when tuned up properly.  the Q ship is a nice ride over the road, just not sporty enough sometimes. plus they are great in the snow.

Ok
  "Drive a Quantum; for those who have time to admire the view"...

"AND feel the need to carry the stage for a gig"

[dieselweasel]

Hmmm...my Golf is only getting about 30-35 mpg as well, even in summer.  Thats 650-700 kms per tank.  Not sure about the mechanical condition of the engine.  There's some oil in the intake and a bit of blue smoke occasionally, but the power output is good and it only uses about 1/2 litre of oil every 5,000 km.  
I've checked the pump timing...it's good.  I even tried applying a constant 12V to the timing advance mechanism, and noticed no change in either performance or mpg.  
I would like to check the engine's compression, but given the cost of a compression tester, I think I might just try a set of new injectors.
Have checked the obvious things such as air filter, tire pressures, new fuel filter...I do probably 80% hwy and only go 100-110 km/hr.  The engine gets up to around 80C in winter and 90 in summer.
It's got 272,xxx km on the clock.

[Mark(The Miser)UK]

Hmmm...my Golf is only getting about 30-35 mpg as well, even in summer.  Thats 650-700 kms per tank.  Not sure about the mechanical condition of the engine.  There's some oil in the intake and a bit of blue smoke occasionally, but the power output is good and it only uses about 1/2 litre of oil every 5,000 km.  
I've checked the pump timing...it's good.  I even tried applying a constant 12V to the timing advance mechanism, and noticed no change in either performance or mpg.  
I would like to check the engine's compression, but given the cost of a compression tester, I think I might just try a set of new injectors.
Have checked the obvious things such as air filter, tire pressures, new fuel filter...I do probably 80% hwy and only go 100-110 km/hr.  The engine gets up to around 80C in winter and 90 in summer.

That's not very good mileage
Whilst I have no experience in your 'electronically advanced' system
 what I can say, is my Quantum had the same poor economy when I bought it. The 'faults I found were  1) Pump timing was set to N/A specs.
This may have been due to 2) the cam was about one tooth out on the belt or about 1.5 teeth out on the fly wheel.
(This I feel may have partly due to the PO's mechanic not taking care when tightening up the cam sprocket AND not rechecking after :roll:
3)I backed off the fueling slightly on the 'Spaceship'  (LDA) diaphragm.
I then cleaned my injectors with 'Redex' and finally ran the car for a few days on pure cannola which cleaned them up.

I'm not sure that low compression neccessarily leads to poor fuel economy as long as fuel is not being wasted. Shortly I will be checking my compression which I suspect after 160000 miles is somewhat weakened; but the fuel economy is as good as ever and very good for a Quantum :mrgreen:

I've just sorted out a compression tester using the bottom from an old injector and a few adaptors.
Whilst I had a tester with no adaptors; I think something could be made from an oxgen gauge a piece of line and at least one valve to hold the pressure

[farkman]

dieselweasel

I agree with Mark that 30-35mpg is crap. Are these US or imperial gallons. I can very easily get 1000km on my 94, with 263,000km, if I had the courage to see the needle go into the red. I usually fill up at 850-950km in winter which uses about 45-50 liters of Sunoco diesel.

Do you fill the tank right up to the filler neck or just stop pumping when the pump shuts off? You can get another 6-7 liters in the tank after the pump first turns off. Not sure about your car, but mine has a little vent tab that you can push to quickly get rid of the air in the tank while filling. This would add another 100km to your range.

What kinds of fluids do you have in your car (motor oil, gear oil)? Changing the motor oil to a synthetic 0W-40 or 5W-40 and the gear oil to a synthetic like Redline or Amsoil could give you another 4-5 mpg.
Using a fuel additive might help also?

What are your tire pressures at? and what size are your tires? If you have tires that can safely go to 44psi then put them up close to that. So long as you don't mind the slightly harder ride.

You can also slow down if your not in a hurry. I usually drive in the slow lane (the right lane) at 90km/h, however some idiots always come up behind me at 110 thinking it's the passing lane. Doesn't matter I just smoke them out and laugh, give them the finger (depending on my mood), or the best is putting on my autodarkening welding helmet (they always look freaked out when I do that). I guess an Optrel Satellite helmet does look a little alien like  :lol: .

Sorry for the long reply.

By the way, you didn't go to Centennial last year did you?

Peter

[dieselweasel]

US gallons.  

When I fill it up I usually just let it pump one more time after it clicks off.  I also have the tab in the filler neck.  Have used it before.  I calculated my mileage based on the amount of fuel I normally put in, about 48L.

I don't have synthetic engine oil, not sure about the trans.  Something I might try though.  I'm on winter tires now but it was the same deal with the summer Pirellis.  They're inflated close to the max.

I find that going 100-110 is far too slow for many people...I get trucks passing me sometimes!

Thanks for the reply.
I did go to Centennial last year for intermediate Truck/Coach tech apprenticeship training.  How bout you?

[farkman]

dieselweasel

Do you have a white 2 door Golf? If so, I was the guy you talked to last year in the back parking lot. I had the silver 94 Golf. I'm finishing the automotive technician course this April.

When you do fill up, is the needle in the red marks yet? I'm thinking that my fuel gauge might be a little off but I'm not sure.

Can your tires go up to 44psi or are they the 35psi types?

Peter

[dieselweasel]

Yeah I remember you...I have a 4 dr actually.  How did you know?  You must remember me complaining about my mileage!  Good memory.  

I always fill up with the needle in the red.  The tires I think will go up to 44 psi.  You know what, tonight after work I'm going to check/adjust the pressures since I haven't done that in a while.  Thanks for reminding me.

What I'm going to do I think is remove the injectors and get them tested by a diesel shop.  

Hopefully I'll be going to Centennial for advanced this year.  Anyway, good luck with your automotive career.

[Patrick]

The other thing you should check tonight is the air filter. A diesel (any internal combustuin engine actually) is a big air pump. If you don't get enough air into it, it will run too rich(burn too much fuel). Good luck!

[farkman]

Good point Patrick

Which reminds me, dieselweasel do you have the snorkel attached to the airbox. It goes from behind the front bumper to the airbox. Theres a screen in there to catch large objects and it might be plugged up and restricting airflow. I took that out completely and cut out the front opening in the airbox as much as I could. It's about a 8" X 3" opening compared to the 2.5-3" hole that was there stock. I'm only speculating but I imagine that the engine can now get a whole lot more air. I do have a K&N air filter too.

Damn I seem to remember it was a 2 door. So much for good memory I guess. I remember seeing a white 2 door Golf at school, it was probably a gasser then.

Thanks.

Peter