Hello,
I am going to install Vems on Renault 4cyl, 16v engine.
Most of them have 60-2 primary trigger pattern.
- VR, HALL is very common.
- measure for each sensor: if you find 2 pins that measure same resistance in both directions (typically between 300..1400 Ohm), that is VR sensor. Otherwise HALL.
Collect some info (specific engine code, year, ...)