COBB AP= WTF just happened???

Steve1155 · 06-10-2011, 12:56 PM

So installed the stg 1 93 octane map (yes there is 93 in the tank) and pushed it hard last night. Seconds later as I dropped back down to about 70 mph, the car starts for lack of a better word "sputtering". I gave just enough gas to maintain that mph and it was fine but if I went anything past 25% throttle it would sputter harder. The service engine light came on while this was happening for about 4 miles. Then the service engine light turned off and the car was perfect again. I did not push my luck from there as I wanted to make it home. Any ideas anyone???

JHOOPS2 · 06-10-2011, 12:59 PM

Did you check the code?

stevenc · 06-10-2011, 01:14 PM

Check the code before you rush to conclusion.

KingOfJericho · 06-10-2011, 01:19 PM

Sounds like HPFP but the codes will tell the real story.

Steve1155 · 06-10-2011, 01:22 PM

Sorry for the rookie question but will the AP show the code if the service engine light is back off now?

JHOOPS2 · 06-10-2011, 01:28 PM

Yes.

onefast1 · 06-10-2011, 02:02 PM

I agree, really sounds like your HPFP... Uninstall COBB and take it to the dealer. I really hope BMW finds a real fix to the fuel pump problem before my warranty runs out. Constant replacement sucks.

escobar929 · 06-10-2011, 02:10 PM

Quote:

Originally Posted by KingOfJericho

Sounds like HPFP but the codes will tell the real story.

JohnL135I · 06-10-2011, 02:12 PM

It's a HPFP! End of STORY!!!!!! Been there........done that X2

Steve1155 · 06-10-2011, 04:40 PM

I checked the codes and got (P2FA3 mis coding) and (P29D2 misfire in cylinder 6). Anyone know why this would happen? I'm not blaming it on the AP, however it only happened the day after I installed it. Admittedly, this was the first time i "really" pushed it in the car. Guess the N54 didn't like 130 mph+.

1013mm · 06-10-2011, 04:45 PM

just go take the car back to the dealer and get the hpfp fixed. end of story. live on. stop thinking. just do it. NIKE.

Bdh821 · 06-10-2011, 04:58 PM

Quote:

Originally Posted by jzhang

just go take the car back to the dealer and get the hpfp fixed. end of story. live on. stop thinking. just do it. NIKE.

LOL

135iNewb · 06-10-2011, 05:42 PM

11k miles on my 135 no trouble. Two weeks after my Cobb install, my HPFP went out. I dont think its due to the specific cobb tune, but I do feel it wouldn't have happened had I not run a tune at all.

Then again, others with no tunes have replaced their HPFP's.

SoCali E36 · 06-10-2011, 06:43 PM

Quote:

Originally Posted by Mark Attack!

I agree, really sounds like your HPFP... Uninstall COBB and take it to the dealer. I really hope BMW finds a real fix to the fuel pump problem before my warranty runs out. Constant replacement sucks.

lemon the damn thing. you will get a lot of your money back

Sal@AUTOcouture · 06-11-2011, 03:44 PM

sounds like injectors or hpfp

SSIMPS · 06-11-2011, 04:20 PM

this happened to me exactly with procede when i started pushing 14+ PSI. I changed spark plugs and now it runs beautifully. Change those first because easiest cheapest, then move on to coils, injectors and hpfp.

uberschnell · 06-11-2011, 05:53 PM

I've had this sort of thing happen after changing out parts like FMIC, intake, etc. and not letting the engine adapt before pushing it.

Those don't look like HPFP codes.

roo97ss · 06-11-2011, 10:42 PM

Quote:

Originally Posted by 2010AW135i

you guys do realize that the HPFP delivers ~3000PSI of fuel. Making it work that much harder than a normal pump which is why bmw has so many failures.

Dont blame the tune, your pump was on its way out.

FWIW I had 2 pumps replaced before I got my tune.

You do realize there are a lot of manufacturers using direct injection on their cars and of course very high pressure pumps in there diesels without these fiascos. Hell even ford can do it right...there's NO EXCUSE....

And to the op as all have said its hpfp #2 for you

SCHNELL1 · 06-12-2011, 07:38 PM

Misfire only in cyl 6 ? sounds like an injector. Have you had all your recall(s) performed ? I'd return the car to stock, bring it to the dealer, address your driveability issue, and continue enjoying your car. Don't blame the tune ! Don't lemon the car !

FORCED AIR · 06-13-2011, 09:58 AM

wow...people are very quick to blame HPFP. That code doesn't suggest HPFP at all. How many miles on your spark plugs?

Could be plugs, coils, injector...way more likely than a HPFP. It only happened on one cylinder. Then again it could have just needed to adapt...or been some bad fuel.

Hold off on dealer...car isn't going to let itself blow up or anything. Clear the codes. If it happens again either go back to stock and dealer it, or swap plug, coil, injector to a different cylinder and see if the misfire moves there...swap those separately to isolate the problem.

nsquared · 06-13-2011, 12:03 PM

Quote:

Originally Posted by jzhang

just go take the car back to the dealer and get the hpfp fixed. end of story. live on. stop thinking. just do it. NIKE.

I love you

, no homo.

Steve1155 · 06-13-2011, 02:17 PM

Removed the tune and took the car to the dealer. Figure what could it hurt. I'll let you guys know what was found. I know it ain't saying much but the current fuel pump is only about 2 months old, and I don't think that's the problem. I'm gonna guess coil pack or injector.

06-10-2011, 12:56 PM	#1
Steve1155 Second Lieutenant 16 Rep 238 Posts Drives: Mine Join Date: Jan 2011 Location: San Antonio, TX iTrader: (0)	COBB AP= WTF just happened??? So installed the stg 1 93 octane map (yes there is 93 in the tank) and pushed it hard last night. Seconds later as I dropped back down to about 70 mph, the car starts for lack of a better word "sputtering". I gave just enough gas to maintain that mph and it was fine but if I went anything past 25% throttle it would sputter harder. The service engine light came on while this was happening for about 4 miles. Then the service engine light turned off and the car was perfect again. I did not push my luck from there as I wanted to make it home. Any ideas anyone???
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06-10-2011, 12:59 PM	#2
JHOOPS2 AKA HISSMAN 34 Rep 888 Posts Drives: 2009 SG 135i Coupe' Join Date: Aug 2010 Location: USA iTrader: (5)	Did you check the code? __________________ (FBO) Cobb Stage 2+, AR Downpipes, Injen DCI, AA (Sport) FMIC, ER Chargepipe/Synapse BOV, Carbon fiber bits and Breyton GTS-R Wheels.
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06-10-2011, 01:14 PM	#3
stevenc Coming Soon 254 Rep 960 Posts Drives: 2015 BMW M4 Alphine White MT Join Date: Apr 2008 Location: Houston, TX iTrader: (0)	Check the code before you rush to conclusion.
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06-10-2011, 01:19 PM	#4
KingOfJericho Major General 2452 Rep 7,341 Posts Drives: Yes Join Date: Aug 2007 Location: CT iTrader: (1) Garage List 2010 135i Coupe [5.26]	Sounds like HPFP but the codes will tell the real story. __________________ The views and opinions expressed in this post are those of the author and do not necessarily reflect the official policy or position of Bimmerpost. 2018 Jeep Grand Cherokee High Altitude Hemi \| 2010 S4 Sold \| 2010 BMW 135i Retired \| 2006 Lotus Exige Sold
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06-10-2011, 01:22 PM	#5
Steve1155 Second Lieutenant 16 Rep 238 Posts Drives: Mine Join Date: Jan 2011 Location: San Antonio, TX iTrader: (0)	Sorry for the rookie question but will the AP show the code if the service engine light is back off now?
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06-10-2011, 01:28 PM	#6
JHOOPS2 AKA HISSMAN 34 Rep 888 Posts Drives: 2009 SG 135i Coupe' Join Date: Aug 2010 Location: USA iTrader: (5)	Yes. __________________ (FBO) Cobb Stage 2+, AR Downpipes, Injen DCI, AA (Sport) FMIC, ER Chargepipe/Synapse BOV, Carbon fiber bits and Breyton GTS-R Wheels.
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06-10-2011, 02:02 PM	#7
onefast1 Private 1 Rep 82 Posts Drives: 2009 135i Join Date: Dec 2010 Location: Albuquerque, NM iTrader: (0)	I agree, really sounds like your HPFP... Uninstall COBB and take it to the dealer. I really hope BMW finds a real fix to the fuel pump problem before my warranty runs out. Constant replacement sucks.
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06-10-2011, 02:12 PM	#9
JohnL135I Donkey Kong King 89 Rep 1,129 Posts Drives: 2012 Boss 302 Join Date: Dec 2007 Location: Sahuarita, AZ iTrader: (3)	It's a HPFP! End of STORY!!!!!! Been there........done that X2 __________________ [SIGPIC][/SIGPIC]
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06-10-2011, 04:40 PM	#10
Steve1155 Second Lieutenant 16 Rep 238 Posts Drives: Mine Join Date: Jan 2011 Location: San Antonio, TX iTrader: (0)	I checked the codes and got (P2FA3 mis coding) and (P29D2 misfire in cylinder 6). Anyone know why this would happen? I'm not blaming it on the AP, however it only happened the day after I installed it. Admittedly, this was the first time i "really" pushed it in the car. Guess the N54 didn't like 130 mph+.
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06-10-2011, 04:45 PM	#11
1013mm aka 1013MM 1253 Rep 9,545 Posts Drives: pokingly flush Join Date: Jan 2009 Location: Los Angeles / HK iTrader: (7) Garage List 2009 135i [8.26]	just go take the car back to the dealer and get the hpfp fixed. end of story. live on. stop thinking. just do it. NIKE. __________________ -John Project YOSHI Sale Thread
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06-10-2011, 05:42 PM	#13
135iNewb Private First Class 15 Rep 146 Posts Drives: 2008 135i Join Date: Oct 2010 Location: Nunyas iTrader: (0)	11k miles on my 135 no trouble. Two weeks after my Cobb install, my HPFP went out. I dont think its due to the specific cobb tune, but I do feel it wouldn't have happened had I not run a tune at all. Then again, others with no tunes have replaced their HPFP's. __________________ 2008 135i 6mt Cobb Access Port Stage 1
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06-11-2011, 03:44 PM	#15
Sal@AUTOcouture 733 Rep 10,105 Posts Drives: E93 M3, E36 M3 Join Date: Feb 2007 Location: Sofla iTrader: (30)	sounds like injectors or hpfp
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06-11-2011, 04:20 PM	#16
SSIMPS Lieutenant 111 Rep 537 Posts Drives: 2018 X3 M40i Join Date: Dec 2008 Location: Orange County, CA iTrader: (2)	this happened to me exactly with procede when i started pushing 14+ PSI. I changed spark plugs and now it runs beautifully. Change those first because easiest cheapest, then move on to coils, injectors and hpfp. __________________ 2018 X3 M40i - JB4 / BMS Billet Intake 2015 M4 6MT - JB4 / Gintani DPs 2005 M3 6MT - VF Engineering S/C / KW / StopTech / Dinan / HPF Stage III (removed)- Track Toy
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06-11-2011, 05:53 PM	#17
uberschnell Brigadier General 675 Rep 4,080 Posts Drives: Wide Body 1 Join Date: Mar 2007 Location: Bay Area iTrader: (48)	I've had this sort of thing happen after changing out parts like FMIC, intake, etc. and not letting the engine adapt before pushing it. Those don't look like HPFP codes.
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06-12-2011, 07:38 PM	#19
SCHNELL1 Enlisted Member 0 Rep 49 Posts Drives: twin turbo Join Date: Mar 2010 Location: USA iTrader: (1)	Misfire only in cyl 6 ? sounds like an injector. Have you had all your recall(s) performed ? I'd return the car to stock, bring it to the dealer, address your driveability issue, and continue enjoying your car. Don't blame the tune ! Don't lemon the car ! Last edited by SCHNELL1; 06-13-2011 at 05:32 PM..
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06-13-2011, 09:58 AM	#20
FORCED AIR Got Boost? 7 Rep 234 Posts Drives: 2010 135i, Msport Join Date: May 2009 Location: The Desert iTrader: (1)	wow...people are very quick to blame HPFP. That code doesn't suggest HPFP at all. How many miles on your spark plugs? Could be plugs, coils, injector...way more likely than a HPFP. It only happened on one cylinder. Then again it could have just needed to adapt...or been some bad fuel. Hold off on dealer...car isn't going to let itself blow up or anything. Clear the codes. If it happens again either go back to stock and dealer it, or swap plug, coil, injector to a different cylinder and see if the misfire moves there...swap those separately to isolate the problem. __________________ - - My Car Domain - - 2010 BMW 135i AT, AW, ///M Sport JB4\|BMS DCI\|MS 3" cattless DPs\|Golf Tee\|33% Tint\|///M Pedals
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06-13-2011, 02:17 PM	#22
Steve1155 Second Lieutenant 16 Rep 238 Posts Drives: Mine Join Date: Jan 2011 Location: San Antonio, TX iTrader: (0)	Removed the tune and took the car to the dealer. Figure what could it hurt. I'll let you guys know what was found. I know it ain't saying much but the current fuel pump is only about 2 months old, and I don't think that's the problem. I'm gonna guess coil pack or injector.
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