Archives

Does any one have any experience or input on N-ice on and volkswagons DSG(auto) Transmission?

How about FAS and TDI?

I have read that repair costs can be staggering.

I have a long downhill grade on my way to work, approx 1.5 miles, I have tried N-ice on a couple of times and am comfortable with the execution of the technique but am concerned with possible damage to the tranny.

My speed stays right at 62MPH w/RPM @ 800 (idle), Shifting back into gear is very smooth, then I apply light throttle to carry me through an "interchange" or off ramp then coast until I get to an uncontrolled (no sign or light) left turn lane that can be taken at lower speed if traffic permits.

I'm not very inclined to try FAS but thought I would ask for educational purposes.

Thanks in advance.

Hi Halfnutz:

___Check in your manual for flat towing cautions and requirements. This will clue you in as to what you may or may not be able to get away with wrt a FAS. As for a NICE-On, I see no reason for an issue other then re-engagement at speed. I have yet to drive a DSG equipped VW but if it is as seamless as some I have read say it is, I suspect there is a rev matching like program built into the logic. Not an ICE RPM control but which gears are engaged at a given speed. I would do a little reading on the DSG in both the manual and one of the TDI forums for more info myself.

___About idling a diesel … A diesel running under a NICE-On consumes ~ ¼ that of a gasoline engine of similar displacement during the same.

___Good Luck

___Wayne

Thanks for the info. I realized after I sent the thread that there may be some insight to be had from reading the towing instructions.

You may be right about the logic thing too, as when I reengage the tranny it goes smoothly into 6th gear and RPMs come up to around 1900 to 2000.

Do you work thrid shift too... get some sleep man:D
>Halfnutz

If I am completly off of the throttle while going down a hill, am I using any fuel?

For anyone unfamiliar w/VW w/DSG trans, on the instrument panel it shows which position the transmission selector is in i.e. P,R,N,D,S but it will also show which gear the trans is in 1,2,3,4,5,6. Moving the selector to the right while in "D" allows you to shift up or down somewhat like a manual transmission, although it will not let you go too far up which prevents you from forcing the engine to lug at lower speed. It will however let you downshift. and if left in that position at a stop will place you in 1st gear and leave it there until you shift...Makes you look like an idiot if you forget that you were playing w/ the gears. "S" is for "sport" or "sucks fuel" I don't really use manual feature or "S". I'm not sure why a 100HP diesel that takes 11+ seconds to reach 60mph has "S" anyway.

>halfnutz

I have the Toyota made Triptonic 6-speed on my Passat - the manual is very specific about always having the engine running when rolling - I coast in neutral but only engage Drive when the car is at a near compltete stop.

Do you a iFCD ?

No I don't have ifcd. Hope to have scan gauge by end of year. I am going to go back through my manual to see exactly what it says today.

Thanks for the feed back.
>halfnutz

ifcd ? - Dude my '96 Passat wagon had one & the '-07 also has one (value edition) - O thought all VW's had iFCDs.

The driver information display or whatever they call it is an option.
About the only frills I have are the heated seats/mirrors, moon roof and a 6disc SAT radio.
No complaints though.

Sounds fairly loaded to me - I couldn't afford the moon roof or the heated seats, went bare bones on mine

If I am completly off of the throttle while going down a hill, am I using any fuel?



Some cars that are equipped with a manual transmission have a fuel shutoff feature when they are in gear and the Rev's are above a certain number (typically above say 1200 rpm) that the engine completely shuts off fuel. If the car is in neutral, in all cases I'd say, then the car is using some fuel.

Not sure how the VW DSG system works in terms of fuel shutoff mode, but coasting in neutral with the engine turned on, the engine is using a small amount of fuel since it is essentially idling.

Carryfd227, I am inclined to agree with you. Until I get my SG it is more difficult to say which is really more efficient and by how much. I definatly can coast farther using N-ice on due to the lack of engine braking than by just coasting in gear.

Vooch,
LOADED would be mp3, NAV system, 17in. wheels, Fog lights, Driver info display,Powerseats,Tire pressure monitoring, Leather, Rear seat airbags(?) and I probobly missed a couple.
$32k(+) instead of $24k I would guess.

It did come W/floor mats:)

Carryfd227, I am inclined to agree with you. Until I get my SG it is more difficult to say which is really more efficient and by how much. I definatly can coast farther using N-ice on due to the lack of engine braking than by just coasting in gear.

Oh yeah, you'll definitely coast farther with N-ICE on than just taking your foot off the gas.
Since your talking about coasting down a hill its a bit different in your case than mine since I have a hybrid. I have to look at my state of charge and determine if it would be more of a benefit to leave it in gear and try to regen some of that SOC or just turn the car off to completely save on gas.

Heres a tidbit for you. If your coming up to a stop light and when you get your Scanguage you determine that your car does infact enter fuel shutoff mode when you take your foot off the gas, then you could just leave your car in gear and basically achieve the same thing as a FAS in terms of fuel consumption by simply just decelerating as normal... You just obviously will not glide as far in gear as you will in neutral.

The VW does shut off fuel during de-acceleration, but coasting greatly increases mpg's inspite of the fuel use. I have used the neutral coast since my VW was new, 1999 and have experienced no ill effects to the tranny

Here is what I have concluded from coasting and watching the iFCD:

1) Coasting In-Gear: Above (about) 1500 RPM - the fuel flow certainly shuts off. Below (about) 1500 rpm: fuel flow kicks in. One can go in manual mode to keep the revs up

2) Coasting In Neutral: Fuel Flow on at idle level. I've been doing a lot of coasting in neutral and am able to match engine revs decently.

3) Coasting Engine-off: The manual is pretty clear, don't it.