DP Fix Success

nikola · 05-15-2013, 06:00 PM

Hey I know there are a lot posts about the BMS DP Fix, but I just wanted to leave my feedback.

I have GIAC Stage 2 with full exhaust. Installed DP Fix around noon cleared all codes and drove for maybe 50 miles. Got emissions done the same afternoon and passed without a problem.

I have seen some posts saying that it is OK to leave DP Fix installed and others saying that I should remove it until I have to do emissions again. Just wanted some clarification on that.

Thank you.

Eric335 · 05-15-2013, 06:01 PM

I believe Terry recommended you remove it. Basically, from what i undersand, it modifies your O2 readings so that your car doesnt show any errors (for the inspection), these readings in turn modify how your car responds and its tune/AFR. Leaving it in wont necessarily kill the engine, but it wont run 100% either.

*I could be wrong but i could have sworn Terry said this....*

gatorheel · 05-15-2013, 07:39 PM

I took mine out for same reasons. Error on the safe side.

falconey · 05-16-2013, 06:57 AM

I'm interested in this as well. I currently still have mine installed. I'm wondering how it's better to continue to throw codes/SES as opposed to leaving the fix in.

blisstik · 05-16-2013, 12:21 PM

It throws off your AF ratio on one bank. And that's not good.

Quote:

Originally Posted by falconey

I'm interested in this as well. I currently still have mine installed. I'm wondering how it's better to continue to throw codes/SES as opposed to leaving the fix in.

Laid Black 335i · 05-16-2013, 12:26 PM

Just took my test on Tuesday using the DP fix as well. Passed without a problem!

marv85 · 05-16-2013, 12:29 PM

it should not be used along with a tune for the reasons mentioned above. If you don;t need it now remove it.

falconey · 05-16-2013, 02:11 PM

Quote:

Originally Posted by marv85

it should not be used along with a tune for the reasons mentioned above. If you don;t need it now remove it.

What if you don't have a tune? I don't have a tune, yet. I would think that the ratios would still be off if I removed the fix, but I honestly don't know the answer.

idrift4wd · 05-16-2013, 02:12 PM

what does the dial do on it?

marv85 · 05-16-2013, 03:28 PM

Quote:

Originally Posted by falconey

What if you don't have a tune? I don't have a tune, yet. I would think that the ratios would still be off if I removed the fix, but I honestly don't know the answer.

yup, it will skew whatever the reading is to close to stock so your DME doesn't complain.

it's more of an issue when you are running hot, and you want the DME to get unbiased results

dicostal · 05-16-2013, 03:58 PM

I have GIAC stage II with DP fix, see my signature for mods, never removed it and passed emissions without any issues. I am in CT

did not realize people were so worried about it...

Good Luck!!!

ken1137 · 05-16-2013, 05:16 PM

^^+1...I installed it so I can pass emissions with StageII. I was otherwise throwing O2 codes.

boostaholic786 · 05-17-2013, 05:14 AM

Should have got a COBB!!!

cstavaru · 05-17-2013, 05:46 AM

GIAC can disable the O2 codes, if you ask them. They did for me, when I had GIAC.

However do NOT use the DP fix except for emission passing. It causes a lot of trouble and you car basically won't function 100% properly. I a car with JB4 and DP fix that had big problems because of it (it was removed and everything went back to normal).

D27 · 05-17-2013, 07:17 AM

Quote:

Originally Posted by cstavaru

GIAC can disable the O2 codes, if you ask them. They did for me, when I had GIAC.

However do NOT use the DP fix except for emission passing. It causes a lot of trouble and you car basically won't function 100% properly. I a car with JB4 and DP fix that had big problems because of it (it was removed and everything went back to normal).

I just istall my dp fix and I'm still getting 02 code.. You think if I remove it the check engine light would clear

cstavaru · 05-17-2013, 08:32 AM

Quote:

Originally Posted by D27

I just istall my dp fix and I'm still getting 02 code.. You think if I remove it the check engine light would clear

It's a hit and miss...it has an adjustment knob, you have to play with that.

MDORPHN · 05-17-2013, 09:01 AM

Quote:

Originally Posted by boostaholic786

Should have got a COBB!!!

If you have catless downpipes with your Cobb tune, you'll still need a dp fix to pass inspections.

You won't throw a check engine light, but -- without the dp fix -- the OBDII scan won't show "readiness."

Neil

05-15-2013, 06:00 PM	#1
nikola New Member 4 Rep 23 Posts Drives: 2007 BMW 335i Join Date: Apr 2011 Location: Atlanta iTrader: (0)	DP Fix Success Hey I know there are a lot posts about the BMS DP Fix, but I just wanted to leave my feedback. I have GIAC Stage 2 with full exhaust. Installed DP Fix around noon cleared all codes and drove for maybe 50 miles. Got emissions done the same afternoon and passed without a problem. I have seen some posts saying that it is OK to leave DP Fix installed and others saying that I should remove it until I have to do emissions again. Just wanted some clarification on that. Thank you.
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05-15-2013, 06:01 PM	#2
Eric335 Colonel 130 Rep 2,489 Posts Drives: 2007 E92 SG 335i 6MT Join Date: Apr 2011 Location: SW Florida iTrader: (0) Garage List 2007 BMW 335i [7.66]	I believe Terry recommended you remove it. Basically, from what i undersand, it modifies your O2 readings so that your car doesnt show any errors (for the inspection), these readings in turn modify how your car responds and its tune/AFR. Leaving it in wont necessarily kill the engine, but it wont run 100% either. I could be wrong but i could have sworn Terry said this.... __________________
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05-15-2013, 07:39 PM	#3
gatorheel Second Lieutenant 14 Rep 239 Posts Drives: 2007 e90 n54 Join Date: Sep 2011 Location: usa iTrader: (3)	I took mine out for same reasons. Error on the safe side. __________________ 2009 n54 e90 / Sport Pkg (ZSP) / Premium Pkg (ZPP) / black sapphire metallic / Logic7 / AMS FMIC / BMS 3" DP / BMS OCC / Alpina TCU Flash / ER CP + ForgeDV / Cobb
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05-16-2013, 06:57 AM	#4
falconey Captain 483 Rep 681 Posts Drives: 18 f80cs, 21 f97 Join Date: Mar 2013 Location: atlanta iTrader: (0)	I'm interested in this as well. I currently still have mine installed. I'm wondering how it's better to continue to throw codes/SES as opposed to leaving the fix in.
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05-16-2013, 12:26 PM	#6
Laid Black 335i BMW 71 Rep 974 Posts Drives: 2007 BMW 335i (6MT) Join Date: Mar 2011 Location: MD iTrader: (7)	Just took my test on Tuesday using the DP fix as well. Passed without a problem! __________________
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05-16-2013, 12:29 PM	#7
marv85 Colonel 70 Rep 2,626 Posts Drives: '07 E92 335i MT Join Date: Jun 2010 Location: Bay Area iTrader: (7)	it should not be used along with a tune for the reasons mentioned above. If you don;t need it now remove it. __________________ '07 E92 335i 6MT- HP650, inlets/outlets, ER FMIC, VRSF CP, LPFP stg2, CSF rad, 'is Aux rad, ER OC, Ohlins, M control arms, eibach front sway bar. '05 C55 AMG SOLD - '22 Tesla M3P \| '10 E92 335i M, 6MT COBB, FBO, st2 LPFP, Mfactory LSD \| '07 E90 335i, PTF COBB E50, FBO, HFS4
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05-16-2013, 02:12 PM	#9
idrift4wd Brigadier General 149 Rep 3,552 Posts Drives: Three Hundred and Thirty Five Join Date: Jul 2010 Location: Yonkers NY iTrader: (0) Garage List 2007 BMW [7.00]	what does the dial do on it?
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05-16-2013, 03:58 PM	#11
dicostal Lieutenant 55 Rep 495 Posts Drives: 2007 335i Join Date: Jun 2010 Location: Italian in CT - USA iTrader: (0)	I have GIAC stage II with DP fix, see my signature for mods, never removed it and passed emissions without any issues. I am in CT did not realize people were so worried about it... Good Luck!!! __________________ GIAC stage II\|AA DP\|AA Charge pipe and BOV\|AFE S2 Intake\|HELIX FMIC
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05-16-2013, 05:16 PM	#12
ken1137 Brigadier General 89 Rep 3,732 Posts Drives: BMW S1000XR Join Date: Jun 2011 Location: Gilbert, AZ iTrader: (7) Garage List 2009 e90 335i [6.40]	^^+1...I installed it so I can pass emissions with StageII. I was otherwise throwing O2 codes. __________________ BMWCCA member
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05-17-2013, 05:14 AM	#13
boostaholic786 Captain 40 Rep 623 Posts Drives: E92 N54 with MHD Custom flash Join Date: Dec 2011 Location: Plano TX iTrader: (0)	Should have got a COBB!!! __________________ [SIZE="2"]Crimson Red E92 335i M-sport 6-speed with MHD custom stage 2+ flash only , 40% E85/93 mix,+ HRE P40S wheels, KW Clubsport, M3 sways,+BMW performance CF Mirrors, BMW Performance CF deck lid spoiler,+ CF interior trim, p3 vent boost gauge,+ LUX angel eyes (11.73@124mph on street tires)
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05-17-2013, 05:46 AM	#14
cstavaru Brigadier General 313 Rep 3,262 Posts Drives: 2009 335i M Sport Sedan 6MT Join Date: Aug 2008 Location: Bucharest, Romania iTrader: (0)	GIAC can disable the O2 codes, if you ask them. They did for me, when I had GIAC. However do NOT use the DP fix except for emission passing. It causes a lot of trouble and you car basically won't function 100% properly. I a car with JB4 and DP fix that had big problems because of it (it was removed and everything went back to normal). __________________ Mods(click): Cobb + RB Turbos \| Aquamist HFS-4 Meth \| Drexler LSD \| Bilstein B12 Pro-Kit \| Custom K&N Apollo Intake \| Wagner Intercooler \| Macht Schnell Downpipes \| BMW Performance Power Kit \| BMW Performance Exhaust \| BMW Performance Short Shifter \| M3 Subframe Bushings \|
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