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VW Jetta TDI



  • sebring95sebring95 Posts: 3,225
    I don't know about removing an insert, but my TDI came with a "vent" button down in the neck. It's normally "vented" when you screw in the cap, however you can remove it and it lets the tank fill much quicker. If you look down into the neck, there's a black button about 2" down that can be pushed. You can also push the button while filling if you hold the nozzle just right. You'll hear the air venting as the fuel is loading and you won't get the bubbles and what not that normally slows your fillup.
  • bpeeblesbpeebles Posts: 4,081
    Yes - there is an "insert" in the filler-neck that most folks remove so the fuel-pump nozzles will fit in better.

    My TDI has the "insert" removed when I picked it up from the dealer.... so some folks may not even know their TDI had an "insert" if the dealership removed it before they took their TDI home.
  • eliaselias Posts: 1,836
    i've run the same set of 15" ice/snow blizzak WS50 on steel rims on both an 03 jetta TDI
    and 05 passat TDI, and very much recommend that setup.
  • bpeeblesbpeebles Posts: 4,081
    BTW-- removing the "insert" from the filler-neck is commonly referred to as a "ventectomy". Some simple searches on the internet would reveal the procedure.
  • eliaselias Posts: 1,836
    i've read that the new jetta TDIs have an insert in the filler neck to prevent the truck nozzles. i've read they do not have the "vent" and cannot have "ventectomy" - that's only for the "A4" & "B5" TDIs.
    apparently we'll need a new term for what the new jetta TDIs may need regarding their fuel neck: fuel-filler-neck-insert-ectomy?
    i hear the new Benz CDIs have had these inserts too for 05 and 06.
  • cosmocosmo Posts: 203
    What have music287 and I have been saying? All you have to do is look into the filler pipe of an '06 TDI and it is obvious. Obsolete advice is not helpful, folks.
  • eliaselias Posts: 1,836
    cosmo what's up. i am reiterating what you & music287 have said - and that is that a bad thing?
    as for looking into the filler pipe of an 06 TDI, i've done it and i see no filler-insert: 06 NB TDI. that's an A4. the 06 jetta TDI is an A5 and the "jetta tdi special editions" reportedly have some differences compared to the earlier A5 jetta tdis has anyone seen a special-edition-tdi yet? the local dealer has gotten a few but they are sold the day after they arrive, despite the $3k MSRP increase, or whatever it is.
    i'll look into a special-edition-tdi fuel-filler-neck as soon as i can and will report here what i see. also i'll ask the dealer to remove the filler-neck-inserts if they are there and if i am buying...
  • just got this car 2 weeks ago in Anchorage Alaska, got 500 miles on 12 gallons in city driving. getting ready to drive to kansas city then to San jose california, I love this car My truck a 2006 ford dually 11mpg I traded in. $5000 in fuel in 8 months on truck, it was killing us. check out our web site
  • bpeeblesbpeebles Posts: 4,081
    You made a GREAT choice with the TDI for your driving habits. You will really enjoy the >700 miles per tank of fuel. (once engine is broken in)

    One comment - DO NOT USE CRUZE-CONTROL DURING YOUR LONG TRIP. Your engine is still wearing in and running at constant speeds for any length of time is NOT good for breaking in an engine. Instead, vary your speed every 1/2 hour or so and sprinkle in some bursts of full-throttle accelleration.
  • pruzinkpruzink Posts: 112
    I put Nokian Hakkapeliitta 2's on my Jetta and my daughter's Jetta and think that they are great in snow. I have dedicated snow tires just for the winter. You can usually pick up a set of reasonably priced alloy rims on Ebay if you have a place to store the spare set. I have also read some really great reviews from various people on these tires "".
    They are a bit differant from a standard tire, but the were developed in Iceland.
  • pruzinkpruzink Posts: 112
    The larger diameter nozzles are geared toward trucks and has nothing to do with the sufur content of the fuel. I have an 04 Jetta and have done fillups with the bigger nozzles, it just doesn't fit in all the way so I stand there and slow down the pump rate and keep a close eye to be sure it doesn't spill at the end. Right now the sulfur content for LSD (Low Sulfur Diesel) is 500 PPM max; pretty soon you will be seeing ULSD (Ultra LOw) which will be 15 PPM max.
  • pruzinkpruzink Posts: 112
    THere is a very simple modification that you can do to remove the internals for this vent valve. If you go to TDI club and do a search for "ventectomy", you will find a very simple procedure with pictures to remove this rather annoying valve. Some people use a screwdriver to push in on this device to allow a complete fill, I found the best thing is just to remove it. This allows you to get another 1-2 gallons in at fillup. I drive 170 miles before my fuel gauge ever comes down off of "F".
  • pruzinkpruzink Posts: 112
    I have also seen posts where people took a bit loss in fuel economy when there anti-shudder valve started hanging up and did not open 100%. THis valve just momentarily closes when you turn the engine off to kill the air and give a quick shutdown. Then it re-opens and stays open. It will act as a plugged intake causing the engine to suck hard for air if it hangs up and does not fully open.
  • pruzinkpruzink Posts: 112
    VW can and will check your records to see that your oil was changed at the prescribed intervals. You need to keep documentation to that affect or if you need some type of engine repair that could be attributed to not changing the oil they will not honor your warranty. Just an idea: purchase some 505.01 compliant oil, use your computer skills to doctor the receipt date to correspond to when it should have been changed, and start a maintenance index card that you keep in glove box showing dates and work performed in order to have the necesary documentation.
  • I bought a brand new 2006 Jetta tdi a month ago and already the AC is having problems. It will turn off by itself for no reason whatsoever for may 20-30 minutes at a time before turning on again by itself. The air still blows, only the AC cooler is what is malfunctioning. I took it to the dealership and of course it works perfectly for them. They returned the car to me stating that it has no problems and there were no error codes recorded, etc. I need help here. I am really pissed off that I just spend a lot money on this car and already it is broken and the VW service center is unable to diagnose a problem and fix it. I want to take it back to them and tell them to keep it until they diagnose it and fix it. I live in Tucson, AZ and not having AC for half an hour at a time in 100+ degree weather is not fun. Does anyone know what might be the cause of the problem? I don't plug anything into the cigarette outless so I am not straining the alternator. what do you recommend for dealing with the VW dealership?
  • Thanks for info re MPG.
    Please explain NOT using the throttle when starting from a stop! (It is a manual transmission.) Tried "driving the torque" but didn't get anywhere.
    Also, live in the hot South where A/C is a must. Does that have much affect on MPG?
  • sebring95sebring95 Posts: 3,225
    Also, live in the hot South where A/C is a must. Does that have much affect on MPG?

    Sure does, especially in city driving or idling. I've measured my fuel injection quantity at idle with a VAGCOM and turning the A/C on increases fuel burn by a good 25%. Doesn't really effect it much on the highway, but around town it's obvious.
  • bpeeblesbpeebles Posts: 4,081
    "Please explain NOT using the throttle when starting from a stop"
    Well, The TDI engine has soooo much torque that there is rarely any need to touch the throttle while enguaging the clutch. Only AFTER the clutch is enguaged should you start to apply throttle.
    In stop-n-go traffic where you are only moving a few carlengths each time... you should not ever need to touch the throttle. With the TDI, it is very easy to enguage the clutch and even shift into 2nd gear and let the idle speed of the engine pull you with traffic.
    Not only is this a better way to drive a manual will maximize the life of your clutch. (I have never- EVER had to replace a clutch on over 6 vehciles each with more than 120K miles)

    The above technique takes some practice and patience... do not expect to "speed away" from a stop... but that is how you conserve fuel. Accelleration should be soooo smmmooottthh that a blindfolded passenger could hardly tell you have started moving.

    I cannot explain it any clearer than that.
  • eliaselias Posts: 1,836
    prizink your advice to nikolay is bad. nikolay please don't do something like that. i sincerely doubt that skipping the oil change has caused damage, or that VW will void your warranty in any way because of you being honest with them.
    top TDI geeks have verified that the TDI oil change intervals are quite conservative - the oil usually lasts much longer than 10k miles. many high-end cars do not recommend the first oil change until 15k or more miles!
    kitty9, yes the AC has significant effect on mpg, but nowhere near 25%. 10% max. on my 2003 the mpg would drop from about 48 mpg to 45 mpg with AC in use - on the highway too.
    jchallenger, certainly bring the car back to the dealership, or maybe better yet, a second dealership. if they cannot repro the problem i recommend asking to trade vehicles with the service manager for a day or two, whatever it takes so that person will drive your car for an extended time so as to investigate the problem.
    additionally there are data-recorder devices that can be plugged into OBD port, logging all the ECM data including AC information such as compressor duty cycle.
    also your car may have an "AC cutout switch" that is malfunctioning - not sure if the TDIs have these - but it is a switch that disengages the compressor at full throttle so as to get more torque to the wheels.
  • bpeeblesbpeebles Posts: 4,081
    I would also like to add that the term "void your warantee" is really too general.... Even though you may have missed the 5K mile OCI.... that does not mean that the warantee on the rest of the automobile is now "null and void"

    HOWEVER... if you are unfortunate enough to encounter an OIL related failure... VW is well within their rights to refuse to cover the ENGINE. It is VERY unlikely that you will encounter OIL related failure. (Unless you do not use the proper oil specified by VW for your TDI engine!!)
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