x703jko

Ok...had my first major problem with the beast. Last night while driving about 75mph on I270 northbound, went to punch it to pass some ricer that was in front of me holding up the works.

As soon as I stabbed the accelerator I could hear it...the "blatting" sound that others have reported when they had VANOS/CPS problems. Immediately the SES light came on.

Immediately I dove for the first exit, pulled into a gas station and shut her down. As I was waiting to pull into the gas station I could hear the engine idling very roughly. Sounded to me like the CPS problem that some have reported OR a cylinder not firing (yikes! ).

After shutting down, I waited read out the codes:

DTC code: P0441 Evaporative Emission Control System - Incorrect Purge Flow

SES (MIL) code: P1351 Misfire Cylinder 5 With Fuel Cutoff.

The SES code (P1351) explains why the car felt like a cylinder was not firing.
I am not sure about the DTC code though. I am not even sure if the DTC code occured at the same time as the SES code or if they are related.

After reading out the code (and cursing for a few seconds) I tried starting the engine. SES light disappeared and the engine sounded "ok" - no sign of misfire. However, it definately felt like she was underpowered.

I've searched for possible causes (including a recent posting on Cylinder 5 misfire) and the consensus appears to be that the cause is either:

1) MAFS; or
2) Camshaft Position Sensors.

Called my SA at BMW Towson who "ordered" me to bring her in tomorrow. He agreed that it was either MAFS(s) or a CPS - "most likely a CPS". Hopefully they'll scope it out and get her back to where she was before.

My question to you now is: the elapsed time between when the SES light came on and when I shut the engine down was about five (5) minutes. During that time, my peak speed was probably 50 mph. Average speed probably 30 mph. Is there any chance that, since cylinder 5 was shut down (no fuel), other parts of the engine (bearings, valves, engine mounts, etc.) could have been damaged.

Thanks for reading. I will let you know what the outcome is after BMW Towson looks at her.



Jeff

__________________
2003 M5 LeMans Blue/Caramel/Walnut
Dinan S3 Includes all Dinan S3 Mods With JRZ Sruts/Shocks, Oil Cooler, Monoball Links
StopTech 4 Wheel BBK With Red Calipers And Slotted Rotors
Axxis Ultimate Pads
M Enhanced Audio
Park Distance Sensors
Two Sets Of Dinan Lightweight Forged Wheels
Winter Tires - Michelin Pilot Sport A/S - 275/35ZR18(Y) (F); 285/35ZR18(Y) (R) (Not Sure If They'll Survive The S3)
Summer Tires - Toyo RA1s- 275/35ZR18(Y) (F); 275/35ZR18(Y) (R)
Dual, Front Mounted LE30's With Custom AIDesigns Kill Switch/LED Panel
Valentine V1 With Stealth One
UUC Short Shifter With DSSR
Oil - BMW/Castrol 5W30 Changed and tested every 3000 miles.

BlueBomber

FWIW, I've never had the errors you've mentioned above when dealing with my CPS errors.

Good luck with the fix and let us know how everything turns out!

__________________
Johnny
06/2000 Lemans Blue

x703jko

Thanks for the info. In fact, no one else on the board (as far as I can see) has reported engine misfire with fuel shutoff.

I will report my findings in due course.

Jeff

jmlutz01

Could it be an o2 precat sensor?

XrayMD

Jeff..get a Peake Research tool for reading your OBD codes. You'll get codes that are BMW specific and much more helpful than the standard OBDII PXXXX codes. It's relatively inexpensive and is small enough to be kept in the vehicle for when you need it. You can also reset the SES light as well as service interval lights.

__________________
Steve
'02 M5 LeMans Blue:

Active Autowerke CAI/brake ducts
Supersprint Headers and cats
SuperSprint exhaust with X-pipe
Evosport custom 3.45 diff. with 30% lockup and 2x dynamic lockup
UFMotorsport intake air temp sensor relocation
Powerchip Gold (SS header/cats version)
Ignition Solutions plasma coils
Dinan Stage III suspension
BeastPower sway bar brackets
Dinan front strut tower brace
Stoptech Custom Silver Big Brake kit (fronts)
RMS short shifter
Rogue Performance transmission mounts, Royal Purple Synchromax fluid
Llumar window tint (35%)

x703jko

SA says that O2 sensors are not the cause of this problem but they will "consider it". We'll see... Jeff

x703jko

Actually, I have an Auterra Dynoscan tool that is pretty good at code readout. It also has BWM specific codes. What it doesn't do is suggest the reasons for the SES or DTC codes. Does the Peake tool tell you what the potential causes for the failure are?

Jeff

XrayMD

Jeff... I have the Auterra tool as well, but the Peake tool is much more helpful. It will give you more info. The Auterra's codes are really not BMW specific. The first thing the Peake tool does is determine your engine type and give you a number that corresponds to a chart in the manual. Following that are numbers that are looked up in that specific chart.

For example, the M5 S62 chart is # 18. Some code examples are: F7=VANOS pressure accumulator valve B5=filler cap open 6E=Sport switch LED indicator 39=MAF cylinders 5-8 and how about the one I had most recently that sent me into limp mode...0A=exhaust camshaft position sensor...folllowed by multiple codes indicating all of the cylinder misfires.

I feel that this info is more appropriate than the PXXXX codes you get from Auterra and others (I have them and have used them as well, including PC versions and Palm versions).

The Peake tool gives you hexadecimal codes. These are different from the dealer report codes which are in decimal format. You can convert these if you like. (Multiply the left digit times 16 and add it to the right digit. Letter values A - F correspond with 10 - 15 respectively), so, for example, code A3 would be 163 in decimal.

BlueBomber

Jeff...

I've got the Peake Research tool and it works very well. If you have time, I can show you how it works (to see if you'd be interested in buying one). If you're on I-270 frequently then I'm only about 7 minutes from the Falls Road exit.

x703jko

Very cool information. I'll have to get one of those!

Jeff