2002 BMW 318i Wagon (N42 Engine) Cold start issues

[bmw328]

I’m currently trying to help a friend with e46 Wagon with N42 engine. Had done a lot to get this car running due to the fact that it was butchered by a couple of bush mechanics and left for dead.
Currently only issue with it is mysterious cold start “Spook”.

(Lets call it the 3 start start)
Start 1 - Running rough, fouling spark plugs, die after 15 seconds.
Start 2 - Immediately after start 1, Runs better (On all cylinders), but die if you rev it a little bit.
Start 3 - Immediately after start 1 & 2, Starts an drive perfectly (One start) 

In afternoon once it’s warmer outside it would start without issues.

Here is the DTC’s: (Always)
2764 – Secondary Air Pump (ECU from model that had one, this car does not)
278A – Ambient Temperature (Missing outside temp sensor?)
27EC – No CAN Message from EGS (ECU from Auto model, this car is manual)
 
DTC’s (Intermittent)
28D7 – Alternator Communication (Car charges fine, ?)
 
DTC’s (When Taking it for a hard drive) -ONLY
2715 - Oxygen-Sensor Heater Before Cat, Bank2
2714 – Oxygen-Sensor Heater After Cat, Bank2
2724 – Oxygen-Sensor After Cat, Bank2 – Signal
Have done the following:
X             Replaced fuel Pump (3 different makes)
X             Replaced fuel filter with regulator
X             Replaced spark plugs with NGK (Seem to be the best the Fouling)
X             Replaced CCV/Hoses
X                  Replaced Engine Temp Sensor
X             Checked/cleaned VANOS solenoids
X             Checked/replaced/swapped CAM, Crank sensors
X             Disabled and set VVT step motor in LIMP home Model (NO difference in cold start behavior)
X             Re-enabled VVTI and relearned stop ends
X                  Cleared adaptations 
 
Can Oxygen Sensor(S) cause car NOT to start in cold? or
could it maybe be gremlin in ECU? or
Maybe leaking injectors?
:fencelook:

 

[bmw328]

Thread update:

Replaced the DME - (Lockset)

Bosch PN 0 261 209 005 BMW DME7 512 354 (Comes from 2001 318i (N42) Auto according to VIN on Realoem)

With

Bosch PN 0 261 209 007 BMW DME7 508 292 (Comes from 2003 318i (N42) Manual according to VIN on Realoem)

Difference is:
Replacement DME logging DTC 2783 Hot-Firm Air-Mass Flow Sensor (Older DME didn't log this fault unless MAF was unplugged)
After unplugging faulty MAF the new DME fired right up, no rough running or miss fires
(Guess software differences because OLD DME would still run rough even if MAF was unplugged (It just wouldn't die with MAF unplugged)

Conclusion?
X Incorrect version DME and
X Faulty MAF

 

[g-man hl]

Thread update:

Replaced the DME - (Lockset)

Bosch PN 0 261 209 005 BMW DME7 512 354 (Comes from 2001 318i (N42) Auto according to VIN on Realoem)

With

Bosch PN 0 261 209 007 BMW DME7 508 292 (Comes from 2003 318i (N42) Manual according to VIN on Realoem)

Difference is:
Replacement DME logging DTC 2783 Hot-Firm Air-Mass Flow Sensor (Older DME didn't log this fault unless MAF was unplugged)
After unplugging faulty MAF the new DME fired right up, no rough running or miss fires
(Guess software differences because OLD DME would still run rough even if MAF was unplugged (It just wouldn't die with MAF unplugged)

Conclusion?
X Incorrect version DME and
X Faulty MAF

To check the MAF: just unplug it, the engine should run on default mode... as opposed to being constantly optimized by the MAF.

 

[bmw328]

Unplugged the MAF, Car running perfectly.