N55 down pipe fix found!

Cory S · 07-15-2017, 12:32 PM

Just got my emissions passed without the O2 simulator

System passes and completes rear O2 readiness 7-10 days before catylist efficiency O2 triggers the SES fault. VRSF catless DP.

Foozed · 07-16-2017, 01:50 PM

Quote:

Originally Posted by Cory S

Just got my emissions passed without the O2 simulator

System passes and completes rear O2 readiness 7-10 days before catylist efficiency O2 triggers the SES fault. VRSF catless DP.

Cory does your sim blink with the engine running?

Cory S · 07-16-2017, 03:26 PM

Quote:

Originally Posted by Foozed

Cory does your sim blink with the engine running?

Dint know. Didn't need to even install it.

Rahim e92 · 07-16-2017, 08:58 PM

Quote:

Originally Posted by Foozed

Quote:

Originally Posted by Cory S

Just got my emissions passed without the O2 simulator

System passes and completes rear O2 readiness 7-10 days before catylist efficiency O2 triggers the SES fault. VRSF catless DP.

Cory does your sim blink with the engine running?

It should blink with the engine running and warm

taranfx · 02-11-2018, 03:33 AM

Quote:

Originally Posted by Cory S

Just got my emissions passed without the O2 simulator

System passes and completes rear O2 readiness 7-10 days before catylist efficiency O2 triggers the SES fault. VRSF catless DP.

Can you explain what exactly you did?

endlessracingz · 03-20-2018, 11:32 PM

I read that there were issues running the catsim with the stock catted downpipe, but has anyone ran it with an aftermarket highflow catted downpipe?

The cattless downpipe smell and volume is just too much for me and I was hoping to solve that with a highflow catted downpipe.

Pladi · 03-21-2018, 01:08 PM

Can anyone confirm that long term fuel trims or any type of fuel trim is NOT affected with this cat sim running all the time on N55s ?? This is an important thing to know. Otherwise it can affect your performance long term. So is second O2 used for fuel corrections or just lambda O2 ?

opjose · 03-21-2018, 02:47 PM

Quote:

Originally Posted by endlessracingz

I read that there were issues running the catsim with the stock catted downpipe, but has anyone ran it with an aftermarket highflow catted downpipe?

The cattless downpipe smell and volume is just too much for me and I was hoping to solve that with a highflow catted downpipe.

I am using the A7 DP fix with high flow cats.

No problems passing emissions.

I would get errors prior to installing the DP fix.

Ludilo · 07-05-2018, 01:15 PM

Quote:

Originally Posted by Pladi

Can anyone confirm that long term fuel trims or any type of fuel trim is NOT affected with this cat sim running all the time on N55s ?? This is an important thing to know. Otherwise it can affect your performance long term. So is second O2 used for fuel corrections or just lambda O2 ?

I would like to know as well.
Per the site below it says it is ok to leave it in the car which would be nice- don't have to mess with it each year before Inspection...

From a vendors website

Product Description
VRSF BMW N55 Downpipe Fix (DP FIX) VR-Speed Factory (VRSF) BMW N55 downpipe fix is now available. Downpipe fix is compatible with BMW E chassis and F Chassis. VRSF downpipe fix will hide the code generated by your BMW ECU when car is equipped with Catless or high flow catted downpipe. Unlike the N54 downpipe fix, this product can be installed on your car at all time and will not alter your AFR values. VRSF BMW N55 Downpipe Fix (DP FIX)

hibye19013 · 07-05-2018, 03:51 PM

Quote:

Originally Posted by Ludilo

I would like to know as well.
Per the site below it says it is ok to leave it in the car which would be nice- don't have to mess with it each year before Inspection...

From a vendors website

Product Description
VRSF BMW N55 Downpipe Fix (DP FIX) VR-Speed Factory (VRSF) BMW N55 downpipe fix is now available. Downpipe fix is compatible with BMW E chassis and F Chassis. VRSF downpipe fix will hide the code generated by your BMW ECU when car is equipped with Catless or high flow catted downpipe. Unlike the N54 downpipe fix, this product can be installed on your car at all time and will not alter your AFR values. VRSF BMW N55 Downpipe Fix (DP FIX)

The fix works for its purpose. I had the A7 one directly from them and not from VRSF. After driving with it on my car for 8 months, I definitely WOULD NOT leave it on. It really did screw with my AFRs and started throwing numerous codes. It ended up being the cause of rough idle as well. Also, the hot engine ended up frying the unit.

Use it as needed and remove it once it served its purpose. My car is happier running without it. The codes haven't come back either. Below are the codes it would throw.

Pladi · 07-05-2018, 04:27 PM

@ hibye that makes sense. And that why i was asking those questions. I know the long term fuel trims are used for idle control and it makes sense that the idle is not good. I would never keep that unit long term

Ludilo · 07-08-2018, 03:06 PM

Hi guys need some help with the N55 Downpipe fix.

11 335i xdrive
Vrsf catless dp
Mhd flashed to stage 0 aka stock
Using the vrsf n55 dp fix which i believe is the ****** sim minus sticker
Installed using the guide on this forum

Unit has the blue light i see it blinking. After 50 miles i hit ready on all monitors besides evap. At 53 miles check engine light came on

Those are the codes. Anyone expirience this? Is my oxygen sensor bad?

I am in NY state which allows 1 monitor in not ready state to pass. Can i still go get inspected with the codes and check engine light or will that be an automatic fail even though my o2 and cat monitors are ready?

Is it possible to get a defective simulator? Not sure where i go from here.

Many thanks in advance

Ludilo · 07-08-2018, 03:08 PM

Link to my codes in case pic dont show up

View post on imgur.com

Ludilo · 07-09-2018, 08:16 AM

Anyone?

J3 · 08-25-2018, 10:03 PM

Quote:

Originally Posted by Ludilo

Anyone?

Were you able to get your situation resolved? Mine is installed. Switches from a solid state to blinking and is throwing the CEL light on.

Ludilo · 08-26-2018, 12:37 PM

Quote:

Originally Posted by J3

Were you able to get your situation resolved? Mine is installed. Switches from a solid state to blinking and is throwing the CEL light on.

Yes I took it out completly and flashed back to MHD Stage 2 (i have a vrsf catless dp) and drove for 20 miles. I am in NY State and passed inspection with no problems for catalyst it says not avaliable which is ok- incomplete is bad and u can pass with one which was the Evap system for me.

Also no more check engine light or codes related to the oxygen sensor.

tcabill · 09-27-2018, 06:19 AM

Got A74 installed and passed with VSRF DeePee. I have a 2012 535i PWG car. Had to drive cycle and drive moderately to testing station. WOT would throw codes but monitors remain ready. Got my cert and removed the device till next time in 2 years.

sänd_mönstä · 10-13-2018, 09:27 PM

Quote:

Originally Posted by J3

Were you able to get your situation resolved? Mine is installed. Switches from a solid state to blinking and is throwing the CEL light on.

Reviving a dead thread, but i'm having the exact same issue and the DME is throwing a code.

2D1F: Oxygen sensor after catalytic converter, electrical: Short circuit to B+

Divbetic · 10-17-2018, 09:25 PM

Just installed the VRSF fix and got a service engine soon light with the code 2D15, will this cause me to fail CA smog or will they just be concerned about readiness?

BOOSTLEE · 10-18-2018, 01:05 PM

Quote:

Originally Posted by Divbetic

Just installed the VRSF fix and got a service engine soon light with the code 2D15, will this cause me to fail CA smog or will they just be concerned about readiness?

check with your local laws, here in NC any dme code, you will fail period.....
beside any code related to the O2 sensor, you will not get catalytic readiness.

ChadN55 · 05-03-2022, 09:59 AM

bringing this back up, anyone with bootmod3 and a catted downpipe able to pass in NY?

07-15-2017, 12:32 PM	#331
Cory S Major 306 Rep 1,163 Posts Drives: 2011 335i-X Join Date: Oct 2015 Location: N.H. iTrader: (0)	Just got my emissions passed without the O2 simulator System passes and completes rear O2 readiness 7-10 days before catylist efficiency O2 triggers the SES fault. VRSF catless DP.
	Appreciate 1 Johnny Boost324.50 Quote

03-20-2018, 11:32 PM	#336
endlessracingz Registered 0 Rep 3 Posts Drives: 2015 BMW 435i M Sport Join Date: Jan 2018 Location: Los Angeles, CA iTrader: (0)	Highflow Catted Downpipe I read that there were issues running the catsim with the stock catted downpipe, but has anyone ran it with an aftermarket highflow catted downpipe? The cattless downpipe smell and volume is just too much for me and I was hoping to solve that with a highflow catted downpipe.
	Appreciate 0 Quote

03-21-2018, 01:08 PM	#337
Pladi Lieutenant Colonel 722 Rep 1,753 Posts Drives: 2011 335i xdrive Join Date: Nov 2017 Location: Waterloo, ON Canada iTrader: (0)	Can anyone confirm that long term fuel trims or any type of fuel trim is NOT affected with this cat sim running all the time on N55s ?? This is an important thing to know. Otherwise it can affect your performance long term. So is second O2 used for fuel corrections or just lambda O2 ?
	Appreciate 0 Quote

07-05-2018, 04:27 PM	#341
Pladi Lieutenant Colonel 722 Rep 1,753 Posts Drives: 2011 335i xdrive Join Date: Nov 2017 Location: Waterloo, ON Canada iTrader: (0)	@ hibye that makes sense. And that why i was asking those questions. I know the long term fuel trims are used for idle control and it makes sense that the idle is not good. I would never keep that unit long term
	Appreciate 0 Quote

07-08-2018, 03:06 PM	#342
Ludilo Enlisted Member 7 Rep 47 Posts Drives: 2011 BMW 335 Join Date: Jan 2018 Location: Binghamton, NY iTrader: (0)	Hi guys need some help with the N55 Downpipe fix. 11 335i xdrive Vrsf catless dp Mhd flashed to stage 0 aka stock Using the vrsf n55 dp fix which i believe is the ****** sim minus sticker Installed using the guide on this forum Unit has the blue light i see it blinking. After 50 miles i hit ready on all monitors besides evap. At 53 miles check engine light came on Those are the codes. Anyone expirience this? Is my oxygen sensor bad? I am in NY state which allows 1 monitor in not ready state to pass. Can i still go get inspected with the codes and check engine light or will that be an automatic fail even though my o2 and cat monitors are ready? Is it possible to get a defective simulator? Not sure where i go from here. Many thanks in advance Last edited by Ludilo; 07-09-2018 at 08:16 AM..
	Appreciate 0 Quote

07-08-2018, 03:08 PM	#343
Ludilo Enlisted Member 7 Rep 47 Posts Drives: 2011 BMW 335 Join Date: Jan 2018 Location: Binghamton, NY iTrader: (0)	Link to my codes in case pic dont show up View post on imgur.com
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07-09-2018, 08:16 AM	#344
Ludilo Enlisted Member 7 Rep 47 Posts Drives: 2011 BMW 335 Join Date: Jan 2018 Location: Binghamton, NY iTrader: (0)	Anyone?
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09-27-2018, 06:19 AM	#347
tcabill Private 14 Rep 51 Posts Drives: e63 650i, F10 535i, E93 335i Join Date: Jan 2013 Location: San Diego, CA iTrader: (0) Garage List 2012 BMW F10 N55 PWG [0.00]	Passed in California Got A74 installed and passed with VSRF DeePee. I have a 2012 535i PWG car. Had to drive cycle and drive moderately to testing station. WOT would throw codes but monitors remain ready. Got my cert and removed the device till next time in 2 years.
	Appreciate 0 Quote

10-17-2018, 09:25 PM	#349
Divbetic Private First Class 76 Rep 161 Posts Drives: 2011 135i Join Date: Feb 2018 Location: Placer County, CA iTrader: (0)	Just installed the VRSF fix and got a service engine soon light with the code 2D15, will this cause me to fail CA smog or will they just be concerned about readiness? __________________ 2011 135i 6MT PS2 \| Fuel-It PI \| MHD
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05-03-2022, 09:59 AM	#351
ChadN55 New Member 2 Rep 12 Posts Drives: 2014 335i Join Date: May 2022 Location: Westchester, NY iTrader: (0)	bringing this back up, anyone with bootmod3 and a catted downpipe able to pass in NY?
	Appreciate 0 Quote