help diagnosing code 29dc plz

Turbo_power4ever · 01-04-2016, 07:45 AM

http://www.datazap.me/u/espinozae199...=1-3-4-5-10-17
CYLINDER INJECTION SWITCH OFF. my car's ses light will pop up and car will loose power. once i turn it off and back on it works fine again. it only does it on wot. i got sage 2 lpfp runnin e60 fbo minus inlets. According to the dealer the hphp was changed out in 2008. wasnt the recall till 2009? u guys think i can get a new hpfp through recall? my car has 99k miles, 10/06 build. the log was during the wot into limp mode. from what i read its either hpfp, lpfp or lpfp sensor. TIA

Sered · 01-04-2016, 08:13 AM

I may be wrong, but it looks like your FP_H is perpetually low. It's spikey as hell too, mine reads pretty smooth. I'd guess your HPFP is on the way out. It's also possible your HPFP is trying to adjust to increased fuel pressure. I had this issue when I installed my Stage3+ pump and it overwhelmed the system on the first go. I cleared codes and reset adaptations and haven't had any issues since.

My logs on my ST setup show FP_H around 13 steady and FP_L around 72-74. I've not had any issues.

Turbo_power4ever · 01-04-2016, 08:42 AM

Thanks for reply. Ive had this setup for over half a year and everything has always been fine. It just now started to happen. Guess ill give the dealer a call to see if it possible to get my hpfp replaced. Unfortunately all my stock parts have been sold so they will prob refuse. If not ill have to buy one and do the install myself.

Sered · 01-04-2016, 12:01 PM

FYI, an E60 mix is too much E85 for the HPFP. I've been told to not go past E50 and even then I've seen people have trouble with it. Try dialing back to E30-E40 and see if you get the same results. You shouldn't be running a mix that high in the first place unless you've got TBI or PI

Turbo_power4ever · 01-04-2016, 03:10 PM

Quote:

Originally Posted by Sered

FYI, an E60 mix is too much E85 for the HPFP. I've been told to not go past E50 and even then I've seen people have trouble with it. Try dialing back to E30-E40 and see if you get the same results. You shouldn't be running a mix that high in the first place unless you've got TBI or PI

Okay. I thought it was fine with stage 2 lpfp. I will reduce ethanol mix and see if that helps

01-04-2016, 07:45 AM	#1
Turbo_power4ever Captain 95 Rep 607 Posts Drives: Fbo blacked e92 Join Date: Feb 2015 Location: Nky iTrader: (2)	help diagnosing code 29dc plz http://www.datazap.me/u/espinozae199...=1-3-4-5-10-17 CYLINDER INJECTION SWITCH OFF. my car's ses light will pop up and car will loose power. once i turn it off and back on it works fine again. it only does it on wot. i got sage 2 lpfp runnin e60 fbo minus inlets. According to the dealer the hphp was changed out in 2008. wasnt the recall till 2009? u guys think i can get a new hpfp through recall? my car has 99k miles, 10/06 build. the log was during the wot into limp mode. from what i read its either hpfp, lpfp or lpfp sensor. TIA
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01-04-2016, 08:13 AM	#2
Sered Major 148 Rep 1,201 Posts Drives: 08 E90 335i Join Date: Apr 2012 Location: Melbourne, FL iTrader: (3)	I may be wrong, but it looks like your FP_H is perpetually low. It's spikey as hell too, mine reads pretty smooth. I'd guess your HPFP is on the way out. It's also possible your HPFP is trying to adjust to increased fuel pressure. I had this issue when I installed my Stage3+ pump and it overwhelmed the system on the first go. I cleared codes and reset adaptations and haven't had any issues since. My logs on my ST setup show FP_H around 13 steady and FP_L around 72-74. I've not had any issues. __________________ '08 E90 w/ just boltons '09 Z4 sDrive35i w/ just boltons Last edited by Sered; 01-04-2016 at 08:32 AM..
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01-04-2016, 08:42 AM	#3
Turbo_power4ever Captain 95 Rep 607 Posts Drives: Fbo blacked e92 Join Date: Feb 2015 Location: Nky iTrader: (2)	Thanks for reply. Ive had this setup for over half a year and everything has always been fine. It just now started to happen. Guess ill give the dealer a call to see if it possible to get my hpfp replaced. Unfortunately all my stock parts have been sold so they will prob refuse. If not ill have to buy one and do the install myself.
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01-04-2016, 12:01 PM	#4
Sered Major 148 Rep 1,201 Posts Drives: 08 E90 335i Join Date: Apr 2012 Location: Melbourne, FL iTrader: (3)	FYI, an E60 mix is too much E85 for the HPFP. I've been told to not go past E50 and even then I've seen people have trouble with it. Try dialing back to E30-E40 and see if you get the same results. You shouldn't be running a mix that high in the first place unless you've got TBI or PI __________________ '08 E90 w/ just boltons '09 Z4 sDrive35i w/ just boltons
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