recently put a petronix into my 72 and it ran and then it didn't run? Mechanic states issue is not all injectors are getting voltage because four of the injectors show low voltage which inhibits their ability to work and four work. wen the accelerator is depressed, all injectors are getting voltage and all are putting fuel into the engine with the engine idling as the whole engine is getting fuel. When the accelerator is no longer depressed, back to low voltage to the injectors and not running? Any suggestions? Have been driving the car since 1999 and I do like the car except that the gas mileage doesn't match what the book advertises ? ( Not quite 26/19 )? Thanks