Audizine - An Automotive Enthusiast Community

Results 1 to 10 of 10
  1. #1
    Active Member Two Rings
    Join Date
    May 12 2014
    AZ Member #
    220493
    Location
    Montreal, Qc, Canada

    Car acting weird

    Guest-only advertisement. Register or Log In now!
    Hello, so I've searched the forum to see if I can find any related issues, but there are so many that have the same symptoms I'm not even sure anymore, so help please!

    To begin, the thermostat broke, and turned the check engine light, I went to the dealership, the customer service rep. told me it's no big deal and that there are two thermostats, and I don't have to repair this because it doesn't affect the car whatsoever only the degrees not reach 90 degrees, they stay at ~45. He said that it would only require a change IF I want the car to heat up fast in the winter time (which it still does). He said it would cost about 600$ because they'd have to remove a lot of parts and it takes about 4 hours of work...

    After a while, the car started shaking on red lights and stops, not big shakes but it would just shutter for a second and then stop. - While shaking the revs would not increase, they would stay stable.

    I've noticed the car losing power, I would press gas to accelerate on highways, I noticed that it would take more power to accelerate, the car would drive as is, and the kick in and go to ~3k revs and accelerate as well as change gears (mostly from 5 -> 6th, while on Drive)

    Yesterday, I noticed that while I was parked the revs were idling at ~1.1k and it wasn't stable, it would go up and down by 1mm. and after it dropped to 900. (the car had been driven for about 20 minutres on highway and it's hot outside)

    Another thing the car started doing is while I switch gears into parking, the revs would go up for a second, and then drop, it has never done this before.

    I feel like the car is not performing as it should at all, I have a hard time believing it's NOT the thermostat, but also have a hard time believing all this can be caused by it?

    While driving down the mountain, I would be driving around 60km/h in 3rd gear, but revs would be at about 3k, now I don't know why it's liek this, perhaps it's normal?

    I don't know if I have misfires, but plugs have been changed not long ago.

    Please let me know what is the issue.

  2. #2
    Veteran Member Four Rings treginginco's Avatar
    Join Date
    Aug 06 2012
    AZ Member #
    98213
    Location
    Parker, CO

    Maybe you need to do a throttle reset. I can't remember off the top of my head how to do it, but it won't hurt to try.

    As far as the revs..... are you in D or S? My 2013 allroad will really hold gears in S when cruising thru mountains and 'hilly' terrain.

  3. #3
    Veteran Member Four Rings o1turbo30v's Avatar
    Join Date
    Feb 06 2012
    AZ Member #
    87767
    My Garage
    Cars, guns, nuts and bolts
    Location
    Allentown, PA

    PCV valve, there's a recall out for it. And spend the $600 to get the water pump assembly replaced.

  4. #4
    Active Member Two Rings
    Join Date
    May 12 2014
    AZ Member #
    220493
    Location
    Montreal, Qc, Canada

    Quote Originally Posted by treginginco View Post
    Maybe you need to do a throttle reset. I can't remember off the top of my head how to do it, but it won't hurt to try.

    As far as the revs..... are you in D or S? My 2013 allroad will really hold gears in S when cruising thru mountains and 'hilly' terrain.
    I'm in D and from a red light going up the hill, it usually stays in 1st gear until 3k revs then switches.

  5. #5
    Active Member Two Rings
    Join Date
    May 12 2014
    AZ Member #
    220493
    Location
    Montreal, Qc, Canada

    Also, I just checked the spark plugs, and coils they seem to be fine, although i found oil, I'll post pictures. Could that be an issue caused by something on top of that? I changed the air filter and in found oil in there.




  6. #6
    Active Member Two Rings
    Join Date
    May 12 2014
    AZ Member #
    220493
    Location
    Montreal, Qc, Canada

    Quote Originally Posted by treginginco View Post
    Maybe you need to do a throttle reset. I can't remember off the top of my head how to do it, but it won't hurt to try.

    As far as the revs..... are you in D or S? My 2013 allroad will really hold gears in S when cruising thru mountains and 'hilly' terrain.
    ALso I've searched how to reset the throttle, they all say put the key etc.. What's the process for our B8s? since the key is an insert one

  7. #7
    Veteran Member Four Rings Zach L's Avatar
    Join Date
    Feb 24 2010
    AZ Member #
    55071
    Location
    Austin, TX

    That oily pipe inlet is where the factory PCV system routes PCV gases back into the intake tract to be ran through the engine again. You can follow the silver metal pipe to the rear of the valve cover. Every car has oil there. It's the reason some people use aftermarket oil catch cans to attempt to filter out the majority of the oil from the PCV gases before being rerouted through the turbo, all the boost piping, intercooler, throttle body, intake manifold, and finally through the engine. The factory PCV system uses an 'oil separator' but it's only so effective. Nonetheless, a failed factory oil separator will cause extra oil.

    Your first step should be to purchase a ross-tech VCDS cable (vag-com) and run for codes. If very well may tell you the exact sensor or valve that's messing up. Based on your story, I think it's probably just a valve in the factory emissions EVAP system. They fail routinely and are pretty cheap and easy to replace.
    Daily Driver: B8 A4 quattro 6MT, Aruba Blue on Black, Premium Plus, Sport Package, Bang & Olufsen
    Current Projects: 2006 Cayman S 6MT • 2006 VW GTI 2.0T 6MT • 1997 VW Golf • 1982 VW Rabbit Diesel • 1972 VW Bay Window Bus

  8. #8
    Veteran Member Three Rings
    Join Date
    Jun 26 2009
    AZ Member #
    44247
    Location
    Bremerton WA

    The ECU relies on coolant temp to switch between open mode (cold engine) to closed mode (warm engine). In open loop the O2 sensor is ignored and baseline fuel and ignition maps are used. Closed loop the ECU will trim fuel levels to reach optimum burn. I believe it will go off of the last stored fuel trim data but if something else has changed (minor air leak) then the fuel trim would be off. I don't know at what temp the ECU switches. ECU codes would be very helpful for the remaining problems. But a new waterpump/thermostat may solve your issues.
    VMR 710's, APR software, Eurocode HFC

  9. #9
    Senior Member Two Rings TurboNate's Avatar
    Join Date
    May 16 2015
    AZ Member #
    332830
    Location
    El Cajon/CA/San Diego

    Quote Originally Posted by Vitaliy.k View Post

    While driving down the mountain, I would be driving around 60km/h in 3rd gear, but revs would be at about 3k, now I don't know why it's liek this, perhaps it's normal?

    Please let me know what is the issue.
    This is normal. Prevents you from riding the brakes all the way down the mountain. I agree it's a bit in the annoying side driving a constant 45 mph down a hill and pedestrians think I'm gunning it and yell at me to slow down.


    Sent from my iPhone using Audizine mobile app
    2009 A4 Premium+ Quattro
    APR Stage 2 | CTS Turbo High Flow Cat | Custom Intake System | AG 19x9.5 m580 w/ 10MM Spacers In Rear | RS Mesh Grill | 5% / 20% tint

    AKA: NathanMansoor

  10. #10
    Active Member Two Rings
    Join Date
    May 12 2014
    AZ Member #
    220493
    Location
    Montreal, Qc, Canada

    Sorry about reviving an old topic, but about two weeks have passed and I did the throttle reset with the key. It seems to work, but I'm not sure if its psychological or actually "fixing" the issue. Although when driving on the highway, at 100km/h and I want to overtake someone, I press on gas, and the car seems to not react to the acceleration at all, but then suddenly kick in and go to 5k revs. I've also tried driving at constant 100km/h and pressing gas to see if the car would react to it instantly, and no the revs would go up, but the car doesn't have the "pull" I'm really at crossroads now, because at the garage they've told me that I need some cleaning, and told me it should've been done when I had my pistons changed. I called the dealership they told me if they didn't see any issues they wouldn't have performed anything. Now at the garage they told me about he cleaning part only by symptoms, they haven't actually checked anything.

    The car does seem to jerk at red lights, and once again once I park, and put the gear on "P" the car would act up as if it's accelerating, and then go quiet.

    Another issue I have, the car seems to accelerate when I brake, I don't know if it's because it drops to lower gear, but I'm not totally convinced it's a regular thing.

    I don't have codes :/

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


    © 2001-2024 Audizine, Audizine.com, and Driverzines.com
    Audizine is an independently owned and operated automotive enthusiast community and news website.
    Audi and the Audi logo(s) are copyright/trademark Audi AG. Audizine is not endorsed by or affiliated with Audi AG.