MembersPage/RijaRobinson (2012-06-16 11:38:49)

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:

displacement (cm3): 3201

JE pistons 8.5:1 compression ratio

Forged ARROW connecting Rods

Stock cams

GT37/40 hybrid turbo

Engine management:

VEMS V3.6 Firmware 1.1.96

Dual Vanos Enabled

VEMSTUNE 1.2.4

I kept the OEM harness and sensors to have the installation clean and OEM like.

First difficulty is the ignition coils wiring: I did not understand the way the ignition outputs are sequenced. The table is traversed backwards. Why not using outputs A,B,C,D... and then write the right firing order like in TunerStudio for megasquirt?

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.

Question:

Why is the firing order different?

now the firing order is 624153

Next step is trying if the Vanos are well controlled.

Question:

Camshaft target table: what values put avance and what put retard?