Need help SV gang. Car cut out several times then died. Let car set for several hours, it started right up. Next AM car started & I decided to drive it down to the corner store (wrong choice) without checking for codes. Car towed home as it refused all efforts to start plus the car horn decided to join in while trying to get it start? Checked codes & got DTC 16 & 36. Had just replaced the Opti and Coil so I started checking connection. DTC 16 was cleared by disconnecting - connect harnish from Opti to PCM. Car start but DTC 36 remained. Removed Coil/ICM and took ICM to Advance to test. Tested good. Reinstalled & car started up & no codes. "O" happy days. Next AM car cranked but wouldn't start. While checking for codes both the AirPump & Fuel Pump was cycling on and off while key was in the on position ? No DTC codes showed?? What is going on!! Thks for help or advise.