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///Monst3r ///Monst3r is offline
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Car: 07 335i
Default HPFP frozen - 07-23-2019, 06:49 PM

Issue just started a few days ago where high pressure is frozen at 5 on jb4 and car is running lean and misfires at idle. When it first started I was getting misfires with harmful exhaust codes on all cylinders in bank 2. After clearing the codes they have not come back. codes are 190702 and 190002 DMTL issues. Car has new injectors, coils, plugs and hpfp's. LPFP reads well and is at 82psi in most cases (pwm). upon diving the afr dips in and out and when it would normally read 20 at cruise it now reads 3.5. Any heave throttle inputs and it goes to 20 , causes misfires on random cylinders and fuel cuts. JB4 hasn’t kicked to safety map nor have any fuel codes been thrown. Will DMTL pump cause these issues?


07 e92 MT 335i- JP works TS TM 6466 1.0 a/r, custom 4in fmic, vrsf cp, tail bov, custom catch cans, external pcv mod, adv O2's, phoenix intake manifold,fuel it port injection, bms meth kit dual cm10, Motiv twin disk, 450/540 in tanks/ 6an return and regulator, stoptech drilled and slotted rotors & pads,15in drag setup , ST coilovers,berk full exhaust ,jb4 g5, mhd

2012 650i- D0wn pip3s, jb4, custom drop in filters, carbon filter delete

Last edited by ///Monst3r; 07-24-2019 at 12:58 AM..
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Terry @ BMS Terry @ BMS is online now
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Default 07-24-2019, 11:57 AM

Have a log so we can check it?


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///Monst3r ///Monst3r is offline
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Car: 07 335i
Default 07-24-2019, 04:47 PM

So went to start it this morning and lpfp was showing 36psi and car ran real rough then shut down. Swapped the pump out with a walbro 450 and the car started but afr was bouncing all around and would not stay running . I then addressed the only codes popping up 3 dtml codes. Replaced the pump and car runs much better but still dips lean here and there and triggers misfires on 5678. I attached some logs but I’m not sure as to if they’re correct. My JB4 gives values even with the canbus unplugged. The values don't change much when you do plug it in. Is there no bank to bank afr reading for n63? Only one afr1 gives a reading and max lean reads as 3.5 for some reason instead of the usual 20.
Attached Files
File Type: csv 2019-07-24 16_31_23_Map-1.csv (4.8 KB, 10 views)
File Type: csv 2019-07-24 16_30_44_Map-1.csv (4.3 KB, 10 views)


07 e92 MT 335i- JP works TS TM 6466 1.0 a/r, custom 4in fmic, vrsf cp, tail bov, custom catch cans, external pcv mod, adv O2's, phoenix intake manifold,fuel it port injection, bms meth kit dual cm10, Motiv twin disk, 450/540 in tanks/ 6an return and regulator, stoptech drilled and slotted rotors & pads,15in drag setup , ST coilovers,berk full exhaust ,jb4 g5, mhd

2012 650i- D0wn pip3s, jb4, custom drop in filters, carbon filter delete

Last edited by ///Monst3r; 07-27-2019 at 12:29 PM..
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///Monst3r ///Monst3r is offline
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Posts: 257
Join Date: Oct 2014
Car: 07 335i
Default 07-29-2019, 10:14 PM

figured it out. Faulty maf sensors and I think the MAF sensors hate the CAI. Looks like fbo will be it for n63's as its a PITA to Tune. I have boost for both banks but shouldn't I have afr and trims for bank 2 or is it just 1 bank depended?


07 e92 MT 335i- JP works TS TM 6466 1.0 a/r, custom 4in fmic, vrsf cp, tail bov, custom catch cans, external pcv mod, adv O2's, phoenix intake manifold,fuel it port injection, bms meth kit dual cm10, Motiv twin disk, 450/540 in tanks/ 6an return and regulator, stoptech drilled and slotted rotors & pads,15in drag setup , ST coilovers,berk full exhaust ,jb4 g5, mhd

2012 650i- D0wn pip3s, jb4, custom drop in filters, carbon filter delete

Last edited by ///Monst3r; 07-31-2019 at 01:23 AM..
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