Re: IMPCO LPG Adaptive Digital Processor
I used to have something similiar fitted with an lpg setup on a vr commodore.
i cant remember exactly but the red light comes on in idle, and switchs to another L.E.D when accelerating. There are other LEDS that indicate wether the system is running in closed loop etc. Inside the box are a series of pots that are their for a technician to adjust settings to do with closed loop mode and other settings.
I hope this kinda helps but if it doesnt, next time u get your gas tune up, remember to ask them what it is :)