Just installed emu classic with rb pnp kit, did the soldering and installed rb20 base map. TPS shows correct on emu client, outputs work manually so I know something is right. But when I crank the car it doesn’t show any rpm, synchronizing or cranking anywhere. I’m no expert but seems to me the ecu doesn’t understand the nissan CAS at all. No fuel, no spark, nothing. Reached ecumaster tech and they told me trigger should be the same as rb25, this information gave me absolutely no help at all.
I saw youtube channell FSO media about seven years ago had very similar problem with rb20 and he got help from ecumaster to the base map and got the car running. Lucky for me he never told on his videos what had to be changed from the base map so I can’t try if it’s the same with mine.
Anyways the engine is pretty stock rb20, nothing that should effect the trigger. OEM nissan CAS
Any ideas what I should do to try and get the car to understand anything from the trigger?
So I got around the problem myself and I want to share the solution here if anyone has the same issue later on.
With RB20DET common issue with stock ECU is that is stays on after ignition has been shut down. Regularly people just cut the orange wire that goes to the ECCS relay at that point. The car runs perfectly normal after you cut the wire and the ECU turns off also with the ignition.
Turned out my orange wire was cut too and for some reason with ecumaster it doesn’t run exactly the same way as it does with stock ECU and you actually need the ECCS relay to work normally. So I connected the orange wire back and the car started right up.
The symptoms were that there was no 12V to the CAS plug number 3 which seemed very odd. Changed the stock ecu back on and there was the 12V, I have no idea why the RB20DET does that and what’s different with ecumaster but I hope this writeup helps someone later on.
It’s very common to cut the ECCS relay orange wire and just leave it that way because with stock ecu the car just works better that way.