Looks very interesting for a modest price.  A couple of things on the data sheet that caught my eye are:

 

Since the operation impedance is extremely high, the UV TRON should be connected as close as possible to the circuit board within 5 cm.

 

Take care to avoid external noise since a C-MOS IC is used in the circuit. It is recommended that the whole PC board be put in the shield box when it is used.

 

The radiated electrical noise from the coils, plugs and injectors is a potential issue since it is such a high-impedance detector.  The only way to know is to try it.

 

The circuit board may not like the in-cowl environment.

 

Al