Car jerking at WOT as well as 29F2 code

AndyDaBoss · 11-26-2012, 02:17 PM

This problem started after i installed the ER charge pipe and synapse BOV however it might be coincidental . So this happens pretty much most of the time when i'm on map 2 or map 5 (sometimes on map 0) with my jb4 and only happens when i accelerate hard. it feels like the car is cutting fuel hence the 29F2 code - "Fuel high pressure system, fuel pressure". On some occasions after jerking, the car would go into limp mode. i'm not really to sure how to describe this jerking movement but it feels like the car loses power for a quick second and then continues to accelerate. what are the possible problems that could cause this and is there any solutions to try. car is out of warranty and my extended warranty doesnt cover maintenance.

NoQuarter · 11-26-2012, 03:52 PM

Quote:

Originally Posted by AndyDaBoss

Car jerking at WOT

Now that takes some talent. Must be an automatic.

e90328i · 11-26-2012, 03:55 PM

Do you get 29dc as well? I had reoccurring 29f2 and 29dc codes with tune only and the dealer tested the fuel system and everything checked out fine.. I would only get 29dc or 29f2 with jb4.. Cars runs amazing stock still havent figured it out! does it happen without tune??

Deemo · 11-26-2012, 04:02 PM

i would get these codes on map 5, I think it was from running to much e85 causing my lpfp to max out.

AndyDaBoss · 11-27-2012, 02:53 AM

Quote:

Originally Posted by NoQuarter

Now that takes some talent. Must be an automatic.

lol yes it is an automatic

AndyDaBoss · 11-27-2012, 02:55 AM

Quote:

Originally Posted by e90328i

Do you get 29dc as well? I had reoccurring 29f2 and 29dc codes with tune only and the dealer tested the fuel system and everything checked out fine.. I would only get 29dc or 29f2 with jb4.. Cars runs amazing stock still havent figured it out! does it happen without tune??

no i don't get the 29dc code . only 29f2

E92Freak101 · 11-27-2012, 11:09 PM

I'm having this same issue I see u had this problem after the charge pipe n bov dose anyone know if this could be a boost leake causing this?

Mike@N54Tuning.com · 11-28-2012, 06:10 AM

False 29F2 code is a common setting problem and is covered in the firmware notes on BMS forum.

Mike

drm916 · 11-28-2012, 09:47 AM

Quote:

Originally Posted by AndyDaBoss

This problem started after i installed the ER charge pipe and synapse BOV however it might be coincidental . So this happens pretty much most of the time when i'm on map 2 or map 5 (sometimes on map 0) with my jb4 and only happens when i accelerate hard. it feels like the car is cutting fuel hence the 29F2 code - "Fuel high pressure system, fuel pressure". On some occasions after jerking, the car would go into limp mode. i'm not really to sure how to describe this jerking movement but it feels like the car loses power for a quick second and then continues to accelerate. what are the possible problems that could cause this and is there any solutions to try. car is out of warranty and my extended warranty doesnt cover maintenance.

I say its just coincidence. But try going back to stock charge pipe and see if that resolves it.

335i E92 · 11-28-2012, 01:01 PM

Traction control kicking in?

Gugs · 11-28-2012, 01:25 PM

This is random but you said you did Cp-
Did u damage the tmap sensor at all? Plugged it back in? Seated correctly?

AndyDaBoss · 11-29-2012, 12:14 PM

Quote:

Originally Posted by Gugs

This is random but you said you did Cp-
Did u damage the tmap sensor at all? Plugged it back in? Seated correctly?

yes i did i broke the a tab that holds it in place, however i was told i didnt really need the tab. it sits snug on the cp. could that cause this to happen?

AndyDaBoss · 11-29-2012, 12:16 PM

Quote:

Originally Posted by 335i E92

Traction control kicking in?

definitely not traction control . i'm sure i would have grip at 4th gear at around 6k rpm

AndyDaBoss · 11-29-2012, 12:18 PM

Quote:

Originally Posted by Mike@N54Tuning.com

False 29F2 code is a common setting problem and is covered in the firmware notes on BMS forum.

Mike

yes i have checked up on that but would i still be having the jerking issue even if it was a false 29F2?

GetSomeE92 · 11-29-2012, 01:10 PM

Are you running any E85? If so, you may be running too much for your pump to handle.

AndyDaBoss · 11-29-2012, 01:20 PM

Quote:

Originally Posted by GetSomeE92

Are you running any E85? If so, you may be running too much for your pump to handle.

None at all .

akotten · 11-29-2012, 01:29 PM

Quote:

Originally Posted by AndyDaBoss

None at all .

I have similar issues with my Procede on 91 only. It only happens if I turn the boost up. Makes me wonder if my LPFP is going out or the low pressure fuel sensor is bad.

11-26-2012, 02:17 PM	#1
AndyDaBoss Lieutenant 27 Rep 488 Posts Drives: TiAg 08' E90 335i Join Date: Oct 2011 Location: Houston iTrader: (3) Garage List 2008 BMW 335i [4.50]	Car jerking at WOT as well as 29F2 code - Help!! This problem started after i installed the ER charge pipe and synapse BOV however it might be coincidental . So this happens pretty much most of the time when i'm on map 2 or map 5 (sometimes on map 0) with my jb4 and only happens when i accelerate hard. it feels like the car is cutting fuel hence the 29F2 code - "Fuel high pressure system, fuel pressure". On some occasions after jerking, the car would go into limp mode. i'm not really to sure how to describe this jerking movement but it feels like the car loses power for a quick second and then continues to accelerate. what are the possible problems that could cause this and is there any solutions to try. car is out of warranty and my extended warranty doesnt cover maintenance. __________________ 08' E90 335i TiAg \| 19' VMR V710 \| JB4 PnP \| Injen DCI \| Mtec V3 \| Black Grills \| CF ACS Roof Spoiler \| ER Charge pipe w/ Synapse BOV \| Muffler delete
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11-26-2012, 03:55 PM	#3
e90328i Banned 25 Rep 386 Posts Drives: 07 E90 335i Join Date: May 2011 Location: socal iTrader: (4)	Do you get 29dc as well? I had reoccurring 29f2 and 29dc codes with tune only and the dealer tested the fuel system and everything checked out fine.. I would only get 29dc or 29f2 with jb4.. Cars runs amazing stock still havent figured it out! does it happen without tune??
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11-26-2012, 04:02 PM	#4
Deemo Second Lieutenant 7 Rep 297 Posts Drives: 07 E90 335i Join Date: May 2012 Location: Plano, Texas iTrader: (1)	i would get these codes on map 5, I think it was from running to much e85 causing my lpfp to max out. __________________ 07 E90 335i 6AT
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11-27-2012, 11:09 PM	#7
E92Freak101 Enlisted Member 4 Rep 32 Posts Drives: 08 bmw 335i coupe Join Date: Mar 2012 Location: uniontown iTrader: (0)	I'm having this same issue I see u had this problem after the charge pipe n bov dose anyone know if this could be a boost leake causing this?
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11-28-2012, 06:10 AM	#8
Mike@N54Tuning.com Joint Chiefs of Staff 4912 Rep 115,980 Posts Drives: 2007 335i, 2015 M3 Join Date: Dec 2008 Location: N54tuning.com iTrader: (89)	False 29F2 code is a common setting problem and is covered in the firmware notes on BMS forum. Mike
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11-28-2012, 01:01 PM	#10
335i E92 Captain 177 Rep 751 Posts Drives: M22 Join Date: Mar 2010 Location: Manchester iTrader: (1)	Traction control kicking in?
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11-28-2012, 01:25 PM	#11
Gugs Banned 28 Rep 457 Posts Drives: E92 JetBlack Join Date: Jul 2012 Location: Long island iTrader: (1)	This is random but you said you did Cp- Did u damage the tmap sensor at all? Plugged it back in? Seated correctly?
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11-29-2012, 01:10 PM	#15
GetSomeE92 Major 36 Rep 1,176 Posts Drives: '09 Space Gray E92 Join Date: Mar 2011 Location: Miami, FL iTrader: (7)	Are you running any E85? If so, you may be running too much for your pump to handle.
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