After using piggyback ECU's such as Morristech TSI and AEM Fic 6/8 and not satisfied, I decided to go standalone ECU.
Engine code: S50B32
Specs:
6 cylinder in line
Infinite variable camshaft angle on both intake and exhaust(VANOS)
displacement (cm3): 3201
JE pistons 8.5:1 compression ratio
Forged ARROW connecting Rods
Coil on plugs and full sequential
Stock cams
GT37/40 hybrid turbo
3 vr sensors
Crank 60-2
Exhaust 6+1
Intake 6
Engine management:
VEMS V3.6 Firmware 1.1.96
Dual Vanos Enabled
VEMSTUNE 1.2.4
Vanos preamble
- Forget cam-adjustments until the engine drives like a charm
- so well you would take the family on a holiday: it wouldn't stall, or be nervous or misfire.
- Maybe connect light-bulb only (between PFET outputs and GND, so you can see in operation: which operates when, while you watch "sectrig position" and play with target table).
- in BMW, dual outputs actuated for sectrig (and dual for third trig). Basic operation is simple, in short:
- If measured "sectrig position" is lower than adjusted target (in the "sectrig position" table, historically called "intake" but actually sectrig is exhaust for BMW) then Output-A is activated to advance cam (remember it by: A="advance")
- if measured "sectrig position" is higher than adjusted target, then Output-B is activated to retard cam.
- third trigger is similar, but with own "Output-A" and "Output-B" outputs for the other cam (the exact econoseal pin must be configured according the setup).
- after reading the above 3 times (and understanding it), see http://vems.hu/vt/help/v3/v3_camshaft_angle_control.html for more details.
Vanos outputs - 4 PFET outputs requested
- since PFET's switch to +12V (not to GND as NFETs !!!) test all 4 PFET outputs with lightbulb connected between output and power-GND (you have all 5 grounds connected, right ???)
- eg. breaklight max 25W, 2A, min 6 Ohm or perhaps somewhat lower when cold
- first disable the camshaft-angle-control outputs, and use misc1 (or misc2) function to test the outputs (eg. with TPS).
- if all 4 PFET outputs work with misc function-test
- disable the misc output and configure the camshaft-angle-control outputs
- if you have problem with Vanos, add 2 or 4 LEDs (series resistor and series 1n4007 diode or almost any type of diode) so you can see which ones are active (2 DVM is also OK, just connect them so you don't have to hold !).
- if the trigger position shows the hydraulic does not actuate even though the ECU applies voltage, maybe the 2 solenoids are reversed (or go to the intake instead of exhaust) !
- capture vemslog and take note of your comments
Document your wiring of the 4 PFET outputs here:
Link the vemslog or vemscfg here ! - so we can compare to the wiring
There could be 3 scenerios, your sentences would be like:
- see ... vemslog, at sec 17.3 I apply 12V maually to hydraulic actuator ... (ECU outputs DISCONNECTED) but neither sectrig position nor third trig position moves according to vemslog (=> triggerlog will be needed for sure, and perhaps sg wrong with the hydraulic actuator HW?)
- I disabled camshaft angle outputs (both third trig and sectrig) and tested PFETs with the miscX function, but ... does not work (the other 3 works as expected).
- see ... vemslog, at sec 17.5 I measure ... on EC36/.... and ...on EC36/.... although the third trig target is configured .... higher/lower than the third trig position
Your Vanos wiring is needed (on your page) in any case, and most likely .vemslog (and .triggerlog also).
I kept the OEM harness and sensors to have the installation clean and OEM like.
Ignition coils wiring: done
Important note: traversed according the arrows (that point up) in VemsTune
The harness was ready and installed on june 13th 2012.
Sensors were tested OK.
Ignition also OK on the test mode: ignition out 0 drives cyl #1 coil... firing order 054321-->153624
First attempt to start: the ECU asked for Password which I had not. VEMS shop sent it to me then another problem was that ECU was in Safe Mode. Ignition and injection outputs were disabled.
Solution: just upload the config file again.
First start: unsuccesful. Big pop sound on the exhaust.
I checked the sparks and everything was OK. I tried to reduce cranking VE in case the engine was flooded. No succes.
June 15 I verified if the ignition sequence was right.
Method: unplug the first spark plug and just let it on the spark hole. Put a spare spark plug on the corresponding coil plug.
Start the car and check if spark occurs on the compression stroke.
Result: The spark did not occur on the compression stroke so I had to shift up the outputs (ignition outputs table)
The car started right after shifting the outputs 3 times.
The firing order starts according to the cam pulsetrain (often not cyl1 !).
Now the firing order is 624153 (same as 153624, it's no different, it's a circle !)
TODO: testing the Vanos and camshaft movement.
Camshaft target table is directly related to the "sectrig position" and "third trig position" gauges:
- higher values advance,
- lower values retard
I'm not sure I understand this well: (which part ?)
Dual Vanos Output type:
Two outputs used for intake and two (optional) for exhaust.
Use injector or ignition output ( 4ohm => 3A current )
Control method:
Under 450 RPM : OutputA and OutputB inactive
Measured = 0 ... target - 2 deg - PWM-ing range : OutputA active and OutputB inactive , Cam pulse too late
Measured = (target - 2 deg - PWM-ing range) ... (target - 2 deg) : OutputA active and OutputB PWM-ing ( closer to target = PWM duty higher )
Measured = (target - 2 deg) .... (target + 2 deg): OutputA and OutputB active
Measured = (target + 2 deg) .... (target + 2 deg + PWM-ing range): OutputA inactive and OutputB active
Measured = (target + 2 deg + PWM-ing range) ... 360 deg: OutputA PWM-ing ( closer to target = PWM duty higher ) and OutputB active , Cam pulse too early
Just document your wiring and measurements, and given the captured vemslog (preferrably with some comment, like "I disconnected ECU output and at 17 sec applied 12V manually to exhaust cam/... solenoid") we can inspect and review !