Originally Posted by SCHMIDTYS
In a TC engine if something happens with the cams , chain breaks or something , the engine isn't going to run anyways . The crank signal lets the ECM know where the pistons are located at all times and that's really all that's critical . It's a step count setup and when the step count gets interrupted the ECM sets a code and turns on the engine light .
Many EFI auto systems use both a cam and crank sensor set up .
Correct Schmidty. Cam and crank timing are noted on cars due to variable cam timing, with regards to engine power and of course, EPA requirements.
As for the module idea, you are likely right, in that it's for carb only, not EFI.