[maroman88]

Im at a loss on this one. 1998 Blazer ZR2 with 186k miles, need to repair the cause of code P0446, Evaporative Emission Control System Vent Control Circuit Malfunction. Ive replaced the solenoid and the valve neither helped, but both were all crusted up from age/mileage. I replaced the ECM, now the CEL comes on a lot sooner after a reset. Ive started locating and cleaning grounds. I have no checked the tank pressure sensor, but no codes directly related to that. Short of rewiring the entire emissions system, im out of ideas.