@Manko76 I'm having the exact same problem with a 100' ICS controlled tunnel. Everything else seems fine (voltage and lights on eyes, relays etc) but some cars aren't seen by the eyes and send a ghost wash.
We also have another strange glitch where cars that either pay or get RFID scanned, don't get added to the stack. Gates go up, payment processes, but no car on stack.
The two issues combined has led us to running on our auto setting. That's where the eyes do not control the length of the wash, its run by the same distances and timing for all cars. That's solved our ghost issue, as well as the cars missing thing, but we're running incredibly inefficiently.
Did you find any solutions yet? I've spent hours on the phone with ICS and can't figure it out.
Thanks!
Max