'05 3.2L Slamming Randomly

2996 Views 35 Replies 4 Participants Last post by Tudz, 4 mo ago

Tudz

Discussion Starter · Nov 10, 2021 (Edited)

If anyone can help me I will praise you for the rest of my life.

I bought this POS a few months back, had the typical water damage from the drains being plugged the airbag sensor under driver's side was defective from this. Did the brakes, battery, headlight level sensor the usual Touareg issues.

Anyway, I was heading for vacation camping several hours up north and all of a sudden driving on the highway BANG! the entire car jolted forward and it felt like we were going through the windshield. On further diagnosis I noticed the gear selector was highlighting right before it would slam. So I did the first obliviously thing: rebuilt the valve body with sonex valves. Transmission place that put fluid back in for me said it's fine. After driving for a couple hours BANG! Again same issue slamming while driving out of no where only this time the green brake sensor for pulling it out of park came on. So I took it back to the S**T hole that put me in this position in the first place and they said it was the shifter, so they removed mine I brought them one from a wrecker and to keep the story short I ended up getting pissed off and taking the car back and started driving it by selecting the gear without the shifter, moving the cable to select gears. It seemed to be ok after 2+ hour burn but let's be serious we wouldn't be here if it was. Sure enough BANG! AGAIN! It f**king did it again. I don't even know where to start.

It does this while changing gears sometimes, and sometimes not, even with no throttle it will shutter but not slam entirely.

It seems to be after extended drives only or when it hasn't rested for some time.

Valve body has been changed.

The shifter is been removed.

Shifts like butter now tho.

The truck is in shambles.

This truck takes joy in kicking a man while he's down so hopefully you guys can help lift my spirits because I'm $6k in to this thing and ready to give up with no hope in site.

Please I have scoured these forms and the only possibility left I can think of is updates due to TCM bugs?

Oh and to top it off now the headlights flicker randomly.

Also the girlfriend is ready to leave me over hearing about it.

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TRespect

· #21 · Nov 10, 2021

Some more 3.2 threads for your free time:

www.clubtouareg.com

3.2 Valve cover gasket replacement

Anybody done this before? I will use elsawin to do the replacement but if you have any tips or diy info feel free to add them here.

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I did this job and wanted to share some pics. The Treg had developed a serious coolant leak on the passenger side bank (LHD). But the leak was not visible outside or underneath the car. Coolant was leaking on the aluminum coolant return line and evaporated leaving only limescale traces on the...

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Inside a T1 T2 bad fuel pump and how to fix it

I'm not sure I posted something similar but I've always wanted to know why the original pumps were failing at a high rate on the T1 and T2. Maybe more on the T1. Mine i a 2004 and the pumps have not been replaced yet. I'm seeing a rich condition and I'm troubleshooting it bit by bit. I will be...

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Tudz

Discussion Starter · #22 · Nov 10, 2021

I guess time will tell, the good thing is these things are finally starting to show up in the wreckers around here I've got 3 with decent parts left recently so if I have to get into a tranny I will. But from what I can tell no hesitation, I gave it the ringer today for a few hours and man the smile came right back shifted better then it ever has even in limp. Like you said fluid fluid fluid. I'm going to be dumping the fluid out and buying ravenol in as soon as I know the thing won't let me down and the worst is behind me. The ****ing thing shuttered so hard I have a very minor exhaust leak, not to mention bulkhead drains are blocked as my floors are still wet after I thought I cleaned them out, headlight has a mind of it's own, and passenger control arm is shot but drivable for now (dumbass put lowpro Porsche wheels on so I don't care about tires and will be changing them in the spring). I didn't want a project car but I have one. I drove it from St. Catharines to Guelph about 120km today didn't slam till I just got in the neighborhood. But yeah she's parked until we go for another round after the sensor swap. Thanks again I will keep you posted! If you ever need parts our wreckers are cheap here and I could ship it over to you for helping me out!

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TRespect

· #23 · Nov 10, 2021

Thanks mister

I have al the stuff I need over here

I do use ebay and aliexpress a lot for body parts and vw or oem brands for critical stuff.
Grab those wrecked tregs and stash them somewhere you will need them

Let me know how it goes when you’re done with the sensor.

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Humphrey

· #24 · Nov 10, 2021

There's a good chance that its the brake vacuum booster that's toast. Given the year of the YOM and more so VCDS reads mechanical failure. Along checking the vacuum lines you may also want to assess the integrity of the one-way valves along the lines.

TRespect

· #25 · Nov 10, 2021

Bad check valves would cause air flow back to the intake. There are two check valves on that line. One on the brake booster line going to the intake where most of the brake assistance is done. The other, more visible, near the pump.
Most of the time the hose is cracked on the check valves.

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Tudz

Discussion Starter · #26 · Nov 11, 2021

I have changed the brake vacuum booster along with the lines/one way valves (both). Also I have changed the speed sensor. Will scan and update shortly

TommiT

· #27 · Nov 11, 2021

Water on the front carpets can also be aircon condensate and blocked sunroof drains.

If you haven't already seen it here's a thread for reading up about other common Touareg delights!

www.mytreg.com

Buying a Used Touareg - What to look for ????

There have been a number of requests from new members asking what to look for when buying a used Treg. I thought it may be useful to gather all the info into one post which could perhaps be pinned. I've prepared a draft below. I wonder if the regs could suggest any amendments or additions, I'm...

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TRespect

· #28 · Nov 11, 2021 (Edited)

Tudz said:
I have changed the brake vacuum booster along with the lines/one way valves (both). Also I have changed the speed sensor. Will scan and update shortly

That was quick

There are at least four causes for wet floor mats that I know of. The craziest one being a seal between the firewall and the ac drain on the passenger side (lhd). I had to drive with carpet torn open and a paper napkin near the seal to find out where water was coming from. I will upload pictures later.

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Tudz

Discussion Starter · #29 · Nov 11, 2021

TRespect said:
That was quick
There are at least four causes for wet floor mats that I know of. The craziest one being a seal between the firewall and the ac drain on the passenger side (lhd). I had to drive with carpet torn open and a paper napkin near the seal to find out where water was coming from. I will upload pictures later.

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It's still slamming randomly but both the codes are gone. Vaccum leak seems to be fixed. Honestly I was reading the arly threads and recall hearing something about there being issues with TCU software. I think I'm going to send it to the dealer and call around to find a master mechanic that knows the generation. It only does it when it's hot and it's so forceful it has torn the flexpipes now.

TRespect

· #30 · Nov 11, 2021

Ok. What brand did you use for the speed sensor?
Any error codes in the transmission module?
What engine errors do you have now?

Can you check the flex disk health under the car if you see what I mean?

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Tudz

Discussion Starter · #31 · Nov 12, 2021

Looks ok to me, here's the photo. I bought the sensor it from the dealer.

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Tudz

Discussion Starter · #32 · Nov 12, 2021

The only codes from TCM are (I have driven it without the shifter too and reinstalled the one with these codes temporarily but have another one from the wrecker)

Address 02: Auto Trans Labels: 09D-927-750.lbl

Part No: 09D 927 750 BA

Component: AL 750 6A 0556

Coding: 0004153

Shop #: WSC 31414 000 00000

VCID: 6ED328337A62DE6E76F-5000

2 Faults Found:

01045 - Tiptronic Switch (F189)

008 - Implausible Signal - Intermittent

00789 - Backup Switch (F41)

009 - Open or Short to Ground - Intermittent

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TRespect

· #33 · Nov 12, 2021

Ok can you find a pattern to the slamming? Gear number or under load or braking? Anything that can help narrow it down to either engine or transmission?

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TRespect

· #34 · Nov 12, 2021

Can you do vcds advanced logging and try to reproduce the issue?
Go into engine module
Advanced measuring blocks
Choose engine speed, vehicle speed, all 4 abs sensor (don’t have the right block numbers or names) and see if your abs sensors are not sending different speeds and that the engine speed is not being lost somewhere before or when the slamming occurs.
You have to click on Turbo then start logging. Give the log a nice name to be able to recognize it later when analyzing the output.
Then do the same for the transmission module: log all speed input and output sensors and look for weird data like sensors zeroing out or sending crazy data.
You can log up to 12 blocks this way.

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TRespect

· #35 · Nov 12, 2021

Here is how you do the advanced logging and some ideas to help in the future.

VCDS Logging - APR

www.goapr.com

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Tudz

Discussion Starter · #36 · 4 mo ago

FYI update on this was wiring under passenger seat causing intermittent connection with TCM it was a red yellow wire by the door under carpet and blue and black under the seat, repaired issue resolved. ALSO both B-pillars required wiring repair near the floor. VCDS did not throw any codes but when monitoring the blocks in the TCM it would randomly cut out while driving, and would get error light up in MFD. issue has been resolved for months no issues, Now its on the the chain issues.

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