Rough Idle, Engine Fault, Downpipe Error Codes.. 29F4

Galal01 · 11-08-2011, 07:25 AM

Hi,

Heres the thing.. My car has been throwing the following codes.. Rough idling, Misfiring and turning into limp mode everytime I accelerate.. Which led me to believe that they switched the O2 sensors or regulating sensors during downpipe installation..

I lifted the car today and the sensors seemed connected in their popper places.. All black sleeved sensors hook on the longer downpipe and all the grey sleeved sensors hooked up on the shorter downpipe..

Codes:

29F4 - Catalytic Converter Conversion
29F5 - Catalytic Converter Conversion 2

Here are pictures of the downpipe installation & screen codes..

Please let me know what you think..

enrita · 11-08-2011, 07:40 AM

what kind of downpipes are those? never seen anything like that ...

Galal01 · 11-08-2011, 07:48 AM

Supersprint

Galal01 · 11-08-2011, 08:14 AM

BTW I have JB3 Installed with Downpipe Fix...

nitehawk · 11-08-2011, 08:18 AM

Wow supersprint DPs. that must have cost a pretty penny? Those codes are set when your DP fix settings are too weak. I don't know about the rough idle and misfires though...

Mike@N54Tuning.com · 11-08-2011, 09:22 AM

With the wires facing away from you, counter-clockwise is stronger, with 1pm being the strongest setting, while clockwise is weaker, with 11pm disabling the FPFIX all together. Set the DPFIX to 6pm to start. If it is too strong, you will trigger 2C31/2C32 codes via the BT. If it is too weak, you will trigger 29F4/29F5 codes via the BT. Once you trigger 2C31/2C32 codes it can be a challenge to get them to clear. Lower the DPFIX v3 setting 1/8 turn, clear all codes, and reset oxygen sensor/lambda adoptions in the command section. Once 2C31/2C32 codes are triggered they will continue to come back even after the DPFIX v3 has the appropriate setting, until the ECU runs a series of internal checks. So rack up the miles on each setting. 4-5 miles is not enough, more like 20-30 miles of varied driving.

Mike

Galal01 · 11-08-2011, 10:03 AM

Got it.. Thank Mike

Spun Crankhub · 06-24-2012, 07:25 PM

did you ever figure this out?

11-08-2011, 07:25 AM	#1
Galal01 Major General 45 Rep 107 Posts Drives: 2010 BMW M35i Join Date: Nov 2010 Location: Egypt iTrader: (0)	Rough Idle, Engine Fault, Downpipe Error Codes.. 29F4 - 29F5 Hi, Heres the thing.. My car has been throwing the following codes.. Rough idling, Misfiring and turning into limp mode everytime I accelerate.. Which led me to believe that they switched the O2 sensors or regulating sensors during downpipe installation.. I lifted the car today and the sensors seemed connected in their popper places.. All black sleeved sensors hook on the longer downpipe and all the grey sleeved sensors hooked up on the shorter downpipe.. Codes: 29F4 - Catalytic Converter Conversion 29F5 - Catalytic Converter Conversion 2 Here are pictures of the downpipe installation & screen codes.. Please let me know what you think.. Attached Images __________________ 2010 M35i (Complete M3 with Tuned Twin Turbo inline 6)
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11-08-2011, 07:40 AM	#2
enrita Major General 163 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	what kind of downpipes are those? never seen anything like that ... __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
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11-08-2011, 07:48 AM	#3
Galal01 Major General 45 Rep 107 Posts Drives: 2010 BMW M35i Join Date: Nov 2010 Location: Egypt iTrader: (0)	Supersprint __________________ 2010 M35i (Complete M3 with Tuned Twin Turbo inline 6)
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11-08-2011, 08:14 AM	#4
Galal01 Major General 45 Rep 107 Posts Drives: 2010 BMW M35i Join Date: Nov 2010 Location: Egypt iTrader: (0)	BTW I have JB3 Installed with Downpipe Fix... __________________ 2010 M35i (Complete M3 with Tuned Twin Turbo inline 6)
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11-08-2011, 08:18 AM	#5
nitehawk Lieutenant Colonel 111 Rep 1,909 Posts Drives: e92 335i 6MT Join Date: May 2011 Location: Toronto iTrader: (15) Garage List E92 BMW 335i [9.00] E92 BMW 335i \| Retired [10.00]	Wow supersprint DPs. that must have cost a pretty penny? Those codes are set when your DP fix settings are too weak. I don't know about the rough idle and misfires though...
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11-08-2011, 09:22 AM	#6
Mike@N54Tuning.com Joint Chiefs of Staff 5098 Rep 116,225 Posts Drives: 2007 335i, 2015 M3 Join Date: Dec 2008 Location: N54tuning.com iTrader: (89)	With the wires facing away from you, counter-clockwise is stronger, with 1pm being the strongest setting, while clockwise is weaker, with 11pm disabling the FPFIX all together. Set the DPFIX to 6pm to start. If it is too strong, you will trigger 2C31/2C32 codes via the BT. If it is too weak, you will trigger 29F4/29F5 codes via the BT. Once you trigger 2C31/2C32 codes it can be a challenge to get them to clear. Lower the DPFIX v3 setting 1/8 turn, clear all codes, and reset oxygen sensor/lambda adoptions in the command section. Once 2C31/2C32 codes are triggered they will continue to come back even after the DPFIX v3 has the appropriate setting, until the ECU runs a series of internal checks. So rack up the miles on each setting. 4-5 miles is not enough, more like 20-30 miles of varied driving. Mike
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11-08-2011, 10:03 AM	#7
Galal01 Major General 45 Rep 107 Posts Drives: 2010 BMW M35i Join Date: Nov 2010 Location: Egypt iTrader: (0)	Got it.. Thank Mike __________________ 2010 M35i (Complete M3 with Tuned Twin Turbo inline 6)
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06-24-2012, 07:25 PM	#8
Spun Crankhub Major General 1008 Rep 5,151 Posts Drives: 15 F82 SOLD Join Date: Feb 2012 Location: San Jose, CA iTrader: (66)	did you ever figure this out?
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