Hi guys we are having trouble getting vems to run this engine properly, please read carefully before posting a reply and only reply if you have experience, no guess work. don't mean to offend anyone.
Vems support has given me the configuration file to start the engine, now the first problem is the car will start once every 5-10 attempts and when it starts it runs perfect, it idles and revs just fine, I checked all the tables and even went on and tuned the engine but this problem is still there, sometimes while cranking it pops from the exhaust as if the ignition timing was really retarded, I did check the ignition timing with a light when I got the engine running and its fine. The second problem is I have no control over vanos, when I change the figures in target table I can hear the engine note change slightly but when I was running it on the dyno it makes no difference at all on the graph, now when we install the factory computer back on, the power difference is huge, power and torque are nearly double then with the Vems ecu.
with the Vems ecu back on I set my gauges to look at sectrig angle and third trigger angle, with engine idling third trig angle reads around 91 degrees and steady, sectrig jumps all over the place going from as low as 30 degrees to 330+ degrees multiple times per second.
now when I look at inlet or exhaust vanos duty cycle output it sits around 93 percent at 0 on the target table and 99 percent at 80+ on the target table, now this doesn't seem right but I'm out of ideas.
the attachment below is the settings table I received from Vems, I hope someone here can help out as Vems support crew is out of ideas as the dual vanos doesn't come out in the US.
thank you
