Log help: HPFP Or Something else? 29DC and 29CE

wtfmateim65 · 12-23-2018, 01:03 PM

Hello,

So my 2007 335i with MHD BEF and JB4 Map 5 for 91 oct is giving me 29DC cylinder injection shutdown and 29CE misfirings cyl 2 repeatedly after clearing and driving.

Plugs, coils,new index 12 inejctors coded and installed just prior, it drove fine for a couple days and now this. Previously cyl 4 had a fouled plug and I fixed a VCG/OFHG leak so everything was replaced. It cranks fine after clearing codes.

It misfires and throws those codes on the first pull after clearing with a SES light, logged with SES and it looks like stock boost mode and engine is rough and loud like its down on one cylinder. Logs during the misfire attached and show HPFP dip to 4 and 5 a few times while LPFP is consistently 75 to 50s by the end of the run.

Is this slam dunk HPFP or should I get a compression test since its always cylinder 2? No other codes after replacing plugs, coils, injectors and it ran beautifully after that for a few days, could it be fresh injectors finally taxed the old HPFP? 138k miles and had HPFP replaced around 20-25k miles under warranty

https://datazap.me/u/ravi/29dc-29ce-...1-4-9-10-14-17

Any advice appreciated!

Emilime75 · 12-23-2018, 01:26 PM

Swap around coils and plugs first, see if problem stays on #2 or follows plug/coil, do compression test while there. Can try the same with injectors. In other words, a little bit of troubleshooting should help confirm things.

SnailBums · 12-27-2018, 09:20 AM

Quote:

Originally Posted by Emilime75

Swap around coils and plugs first, see if problem stays on #2 or follows plug/coil, do compression test while there. Can try the same with injectors. In other words, a little bit of troubleshooting should help confirm things.

I agree with this. If it was a HPFP would would have multiple misfire and fuel pressure faults. Swap the coils from 2 to 6 and swap plug from 2 to 4 and see what misfire comes back. If it's still cyl 2 you can swap the injector with 6.

I like to swap parts to the other bank (cyl 1-3= bank 1 and cyl 4-6= bank 2.)

Definitely do a dry and wet compression test when you have the plug out.

Mike

12-23-2018, 01:03 PM	#1
wtfmateim65 First Lieutenant 17 Rep 305 Posts Drives: AW 92 335i JB4 Join Date: Sep 2008 Location: Vegas iTrader: (2)	Log help: HPFP Or Something else? 29DC and 29CE Hello, So my 2007 335i with MHD BEF and JB4 Map 5 for 91 oct is giving me 29DC cylinder injection shutdown and 29CE misfirings cyl 2 repeatedly after clearing and driving. Plugs, coils,new index 12 inejctors coded and installed just prior, it drove fine for a couple days and now this. Previously cyl 4 had a fouled plug and I fixed a VCG/OFHG leak so everything was replaced. It cranks fine after clearing codes. It misfires and throws those codes on the first pull after clearing with a SES light, logged with SES and it looks like stock boost mode and engine is rough and loud like its down on one cylinder. Logs during the misfire attached and show HPFP dip to 4 and 5 a few times while LPFP is consistently 75 to 50s by the end of the run. Is this slam dunk HPFP or should I get a compression test since its always cylinder 2? No other codes after replacing plugs, coils, injectors and it ran beautifully after that for a few days, could it be fresh injectors finally taxed the old HPFP? 138k miles and had HPFP replaced around 20-25k miles under warranty https://datazap.me/u/ravi/29dc-29ce-...1-4-9-10-14-17 Any advice appreciated! Last edited by wtfmateim65; 12-23-2018 at 01:09 PM..
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12-23-2018, 01:26 PM	#2
Emilime75 Colonel 1209 Rep 2,476 Posts Drives: 2010 335i E92 LeMans Blue Join Date: Dec 2017 Location: Merica! iTrader: (1)	Swap around coils and plugs first, see if problem stays on #2 or follows plug/coil, do compression test while there. Can try the same with injectors. In other words, a little bit of troubleshooting should help confirm things.
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