How to pick up RPM?

[Pascal]

I have one Chevrolet Epica 2.0 AT. Need to put into M800 somehow RPM. Cant install another choper disk or sensor. My idea is from injectors, to pick up there signal and wire it somehow to M800. Anyone have some expirience? ECU is NOT used to control engine, srandard ECU is running engine. I just need few data's like RPM, brake switch, speed and G-sensor from DDA and thats it.

many thanks!

[John Reed]

If the timing pattern is supported, the easiest way would be to just share the stock crank trigger signal with both the ECU controlling the engine and the MoTeC.

[Pascal]

Problem is that must not come yellow engine problem light on the dash so i am trying to avoid to touch cranck sensor. But maybe can try if there is no other better solution. At moment trying to get idea what is possibly best idea.

Many thanks

[John Reed]

Problem is that must not come yellow engine problem light on the dash so i am trying to avoid to touch cranck sensor. But maybe can try if there is no other better solution. At moment trying to get idea what is possibly best idea.

Many thanks

You should be able to share the signal without causing check engine light. I have done it many many times, on different cars.