Downpipe Issues

[pog]

yeah. he did my cat back with 2 resonators and magnaflow back box. I love the sound of it

Link us up to a sound file!

Also, do you track your car at either Wakefield or EC?

[bfeboi]

i don't have anything that will record with proper audio....

I've dabbled in the art of tracking at Wakie, EC and Oran Park. Heading to wakie this weekend and aiming for 1'13"***.

[pog]

i don't have anything that will record with proper audio....

I've dabbled in the art of tracking at Wakie, EC and Oran Park. Heading to wakie this weekend and aiming for 1'13"***.

No doubt you'll get it. Consider Supersprints like I said last time, it'll be good to have a fellow Polo on course!

---------- Post added 14-03-2012 at 08:33 PM ---------- Previous post was 13-03-2012 at 11:59 PM ----------

In the event that my post cat o2 sensor is gone, (which I don't think it is), does anyone know where I can buy the BOSCH o2 sensor for our car?

Has anyone had to purchase the VW one? If so, what was the cost..

---------- Post added at 08:38 PM ---------- Previous post was at 08:33 PM ----------

Update: Checked the exhaust bolts, and turbo bolts this afternoon, all good. Must be either:

a. The post cat o2 sensor
b. The spacer

Got this: 17584 - Bank1: O2S (Lambda) Correction Behind Catalyst: Control Limit Reached

17584/P1176/004470 - Bank1: O2 (Lambda) Correction Behind Catalyst: Control Limit Reached

Possible Causes
Intake Air System leaking
Oxygen Sensor(s) and/or Oxygen Sensor Control faulty

Possible Solutions
Check Intake Air System for Leaks (False Air) - Will get the car smoked for leaks
Check Oxygen Sensor(s) and/or Oxygen Sensor Control (all of them!) I'm sure it's this!

[geoff_gti]

http://www.vwwatercooled.org.au/forums/f20/polo-9n3-downpipe-query-69429.html

[pog]

Just an update with background so far

•Added 3" downpipe with 200 cell cat with spacer to avoid CEL
•CEL shows up 60 kms later.
•Turns out the spacer is facing to the rear of the car. Switched to face towards the front of the car (drivers side) and clear fault code.
•CEL shows up again 80kms later.
•Disconnected the battery for 30 minutes, unplugged the MAF, reconnected everything again and checked the exhaust bolts.
•CEL shows up 262kms later.

Car awaiting to be looked at on the 24th March. Going to be smoked for boost leaks and a check over again. May be running to lean or to rich, for gods sakes, I have no idea.

Will keep you all updated.

[pog]

Just out of curiosity, does anyone have a downpipe with CEL and has just left it?

Also, when you turn the ignition on, am I right in saying the engine light, handbrake light on and (forget the other light, I think EPS) stay on once the other lights switch off..?

[pog]

My spacer:

[pog]

Update
For some reason, and if you've had this issue before, please chime in...

Under hard acceleration and revs above 2,500rpm, the CEL never comes on. Always about 100kms after clearing the code, if I drive below 2,500rpm (generally in 4th gear) the code shows up on the dash.

Would logic tell you that if you're cruising under 2,500rpm, the air flowing through the exhaust system is not reaching the post cat sensor due to the spacer placing the sensor further from the exhaust? Therefore, the ECU reads a CAT deficiency or Bank 1 P1176 error code.

I think it's now time to start some logging. Can anyone in Sydney help me out here in terms of VAG logging and seeing if the sensor is infact no longer working properly?

---------- Post added at 09:08 PM ---------- Previous post was at 04:28 PM ----------

Would anyone know if a VOLKSWAGEN POLO 2007 MATCH 1.6LTR o2 sensor would be the same as our Polo GTI? Any alternatives other than VW factory stock...

Cheers

[noone]

Have you tried the car without a spacer at all?

[h100vw]

Update
For some reason, and if you've had this issue before, please chime in...

Under hard acceleration and revs above 2,500rpm, the CEL never comes on. Always about 100kms after clearing the code, if I drive below 2,500rpm (generally in 4th gear) the code shows up on the dash.

Would logic tell you that if you're cruising under 2,500rpm, the air flowing through the exhaust system is not reaching the post cat sensor due to the spacer placing the sensor further from the exhaust? Therefore, the ECU reads a CAT deficiency or Bank 1 P1176 error code.

I think it's now time to start some logging. Can anyone in Sydney help me out here in terms of VAG logging and seeing if the sensor is infact no longer working properly?

---------- Post added at 09:08 PM ---------- Previous post was at 04:28 PM ----------

Would anyone know if a VOLKSWAGEN POLO 2007 MATCH 1.6LTR o2 sensor would be the same as our Polo GTI? Any alternatives other than VW factory stock...

Cheers

The one for the GTI is specific, the pre and post ones are different. 1K0 998 262Q is listed as the new replacement on my ETKA.

That's not to say the aftermarket don't make a generic one that will work in a million different vehicles. ie The one with the longest lead will fit all the others, where VW go to the trouble of making them with the right length for each model.

Gavin

[pog]

Have you tried the car without a spacer at all?

Good question, no I haven't. From your experience have you heard anyone with a larger downpipe running no spacer with no CEL?

---------- Post added at 03:01 PM ---------- Previous post was at 02:42 PM ----------

Is it possible to differentiate between pre and post cat o2 sensors?

The reason I'm asking is because probably the fabricator mixed up the o2 sensors. Front to rear and rear to front. If there is a way, can someone let me know?

[h100vw]

Good question, no I haven't. From your experience have you heard anyone with a larger downpipe running no spacer with no CEL?

---------- Post added at 03:01 PM ---------- Previous post was at 02:42 PM ----------

Is it possible to differentiate between pre and post cat o2 sensors?

The reason I'm asking is because probably the fabricator mixed up the o2 sensors. Front to rear and rear to front. If there is a way, can someone let me know?

The forward one is part number 06A 906 262 DK and the rear one 06A 906 262 DL

Gavin

[pog]

The forward one is part number 06A 906 262 DK and the rear one 06A 906 262 DL

Gavin

Thanks Gavin, would this be actually written on the sensor?

[h100vw]

Thanks Gavin, would this be actually written on the sensor?

Yeah it will be. Can't promise it will be easy to read though.

You might need an inspection mirror and a torch or take one out. 22mm they are.

Gavin

[pog]

Yeah it will be. Can't promise it will be easy to read though.

You might need an inspection mirror and a torch or take one out. 22mm they are.

Gavin

What a champion! I'll jack the car up tonight and see if it's written on the sensor or the wiring. God forbid the exhaust shop have them mixed around!

Also, if they were mixed around, would that interfere with the idle, performance of the car? Sorry for the 21 questions.