[TDIwyse]

Originally Posted by BB_cuda

...
TDI, how many miles did you run with Ecotune to get to 9.5 psi back pressure across SCR?

I am looking at doing a 2000 mile road trip starting this weekend and was really hoping the new exhaust would be on. The flanges not shipping is likely going to cause having to wait until after trip. Do either yozh or TDI see the continued use of the SCR/OEM exhaust for 2000 miles as a problem?

I've got some meetings coming up, but will try to figure out the mileage I was at. But I had drained my urea tanks so don't think I was spraying urea, which might change the time to plugging... I'd suggest a quick test would be to get DWR's Torque PIDs in place and look at your exhaust manifold pressure and boost readings. Or use TestO to look at those things. That should give you an idea of how much back pressure you're getting, although it would be a combination of the turbo drive pressure and exhaust pressure...

[xboxgod]

Originally Posted by TDIwyse

Have you tried just draining the urea tanks? That's what I did early on and, at least for me, it didn't cause any issues (no 999 mls to no restart countdown). Can't remember if others tried that and had similar results?

I had sent my DME in with the counter active. When I got it back, the counter was still there. Added a gallon of DEF and it reset. But after a bit, counter came back. This was not coded out and it is still spraying.

[TDIwyse]

Originally Posted by TDIwyse

I've got some meetings coming up, but will try to figure out the mileage I was at...

Looks like it had been about 15,000 miles between getting that tune and then cutting open the SCR.

[BB_cuda]

Perhaps I don't have to chance the extra 2000 miles.

I took car to shop to get started what work they could do. We're now stopped needing the flanges. Tech feels he can get job done in three days. Using circuit werks kit. The middle piece is up and he's cut off the front flanges and mounted the Y. He won't wekd anything until we get the 3" flange.

It looks like the spare tire thing is going to work and maybe just maybe the uhaul hitch can go back on too!!!

[Yozh]

I think I was about 5000-6000 miles when I started to get problems, shadow EGT code started to pop up much earlier.

Xboxgod, I would not suggest you recirculate your Urea back into the tank. Of course a proper tune, such as what most of us are running, is the best course of action for you, as it was for some of us that went the original Ecotune route. If I were you, I would not try to reinvent the wheel and have some local folks "try" to figure out a tune for these cars. Unless, of course you like to experiment.

The other way to approach it, would to contact Stan and ask him to retune your DDE to remove the urea injection properly. It worked for TDI, so Stan should be able to do the same for you. On some level I am convinced that our Ecotune flashes were poorly executed by RSW in NJ, so going to the source would be a good course of action.

In the meantime, you have one issue to deal with, it's the plugged SCR. Two options, gut it, it's plugged and useless anyway. Unless, there is a way to clean it. Another option, would be to do a full exhaust. There are a few recent threads that deal with exhausts people are building and looks like a kit will be out soon. Yes, you will have to port your wastegate to avoid overboosting. You will still spray urea with the current tune, but you can vent it to atmosphere and block the opening on the downpipe, as a crude and rude option before you retune. Or it can keep spraying into the exhaust, you will see nice little white specks on your exhaust tips.

Good luck and keep us in the loop.

[Yozh]

Originally Posted by BB_cuda

Perhaps I don't have to chance the extra 2000 miles.

I would not chance an extra 2000 miles.

[xboxgod]

Originally Posted by Yozh

I think I was about 5000-6000 miles when I started to get problems, shadow EGT code started to pop up much earlier.

Xboxgod, I would not suggest you recirculate your Urea back into the tank. Of course a proper tune, such as what most of us are running, is the best course of action for you, as it was for some of us that went the original Ecotune route. If I were you, I would not try to reinvent the wheel and have some local folks "try" to figure out a tune for these cars. Unless, of course you like to experiment.

The other way to approach it, would to contact Stan and ask him to retune your DDE to remove the urea injection properly. It worked for TDI, so Stan should be able to do the same for you. On some level I am convinced that our Ecotune flashes were poorly executed by RSW in NJ, so going to the source would be a good course of action.

In the meantime, you have one issue to deal with, it's the plugged SCR. Two options, gut it, it's plugged and useless anyway. Unless, there is a way to clean it. Another option, would be to do a full exhaust. There are a few recent threads that deal with exhausts people are building and looks like a kit will be out soon. Yes, you will have to port your wastegate to avoid overboosting. You will still spray urea with the current tune, but you can vent it to atmosphere and block the opening on the downpipe, as a crude and rude option before you retune. Or it can keep spraying into the exhaust, you will see nice little white specks on your exhaust tips.

Good luck and keep us in the loop.

So I am taking the car to the shop to gut the SCR this afternoon. They don't have time to do the waste gate at the moment. If I put the mixer back on, will that work temporarily until I can get the waste gate modded? I read so many threads that I am now confused on if this works or not. I thought TDIwyse said boost went down to around 30psi when putting the mixer back in.

[TDIwyse]

Originally Posted by xboxgod

So I am taking the car to the shop to gut the SCR this afternoon. They don't have time to do the waste gate at the moment. If I put the mixer back on, will that work temporarily until I can get the waste gate modded? I read so many threads that I am now confused on if this works or not. I thought TDIwyse said boost went down to around 30psi when putting the mixer back in.

I think it's likely you would still overspeed the turbo even with the mixer and stock wastegate setup (however without measuring exactly what's going on with an individual car and it's individual mods it's difficult to make a blanket statement). However, if you control your application of the skinny pedal to reasonable levels you shouldn't have any overspeed issues (don't floor the skinny pedal). The turbo risk is mainly related to extreme fueling conditions (from the measurements performed on my car with its particular modifications at that time).

[TorqueAddict]

Originally Posted by Yozh

.......Also, hope you did not fry any wiring or pressure converters with your exhaust breathing through the diff pressure tubes.

This happened with me. Had to order a wiring harness from Germany, as none were available in NA. Sucked big time.

[Persian Whisperjet]

Originally Posted by TDIwyse

I think it's likely you would still overspeed the turbo even with the mixer and stock wastegate setup.

Er, does not having the mixer on make a big difference?

[TDIwyse]

Originally Posted by Persian Whisperjet

Er, does not having the mixer on make a big difference?

Perhaps iaknown can chime in, but IIRC it didn't help him much. From my measurements I recall it helping some. But our configurations were not the same. It would really be best to have good instrumentation when modifying your vehicle...

[DWR]

Originally Posted by TDIwyse

It would really be best to have good instrumentation when modifying your vehicle...

Some of the best advice you will find in this forum.

[iaknown]

Did I hear my name?

First off, without the specific codes it's really hard to diagnose. Kinda pissing in the wind at the problem.

That being said, yea it sounds like the SCR is clogged and I assume you've gutted it. Putting the mixer back will help but the question is how much. For some reason my car seems to make (or at least read) more boost than others. So for me the mixer did not do the trick. The other issue you have is you're running an Ecotune tune so you'll never know what is safe as they remove the overboost safety.

I'd say your best bet until you do the wastegate and log things (and possibly upgrade the tune) is what tdi suggested, put the mixer on and take it easy.

[xboxgod]

Originally Posted by iaknown

Did I hear my name?

First off, without the specific codes it's really hard to diagnose. Kinda pissing in the wind at the problem.

That being said, yea it sounds like the SCR is clogged and I assume you've gutted it. Putting the mixer back will help but the question is how much. For some reason my car seems to make (or at least read) more boost than others. So for me the mixer did not do the trick. The other issue you have is you're running an Ecotune tune so you'll never know what is safe as they remove the overboost safety.

I'd say your best bet until you do the wastegate and log things (and possibly upgrade the tune) is what tdi suggested, put the mixer on and take it easy.

That is exactly what I am doing. The stupid ODB thing I was using with the Torque went out, so I ordered another one that should arrive tomorrow so I can check boost levels.

[fsd350]

I've been using the Bav Tech tool to log my boost. Until next week that is. My wife is getting me an Auto Meter Cobalt boost gauge and a pod for our anniversary. I'm a lucky man.