Greetings everyone, thanks in advance for any insight you can provide.
Quick background on recent work:
Oil Change, New Air Filter, Transmission Rebuild, New Spark Plugs, New Plug Wires, Coolant Flush, New Lifters, Cleaned MAF, Injector Cleaning + O-rings, Connecting Rod Bearings
The vehicle drove beautifully for about a week - when driving home I began to notice a slight hesitation on throttle which grew rapidly worse over the course of 5 miles. I arrived at my home and checked the codes, and returned the following:
P1233, Fuel Pump Driver Module Disabled or Offline
P1406, DPFE Sensor Circuit Downstream Hose (Already remedied, I had broken off a stem and had yet to repair this at the time)
P0300, Random Misfire
P0303, Cyl 3 Misfire
P0304, Cyl 4 Misfire
I checked the inertia switch: Not tripped, receiving and sending 12v.
I then gave a good solid... 'tap' to the CCRM, the engine levelled out for a moment before going rough. I assumed at this point it was a faulty relay. I soldered in a new relay (confirmed 100% exact match) and threw it all back together.
Now, there's an aggressive misfire on 'Random' cylinders... and new codes.
P0316, Misfire Detected On Startup, First 1000 Revolutions
P0300
P0303
P0304
P0113 Intake Air Temperature Sensor Circuit High Input
Now, P0113 I can't make any sense of. The information I have found leads me to believe that the MAF is a combination of IAT and MAF on this vehicle. Disconnecting it and restarting the engine resulted in no noticeable change, no new codes. Restarting the engine with the sensor reconnected results in no change, and no new codes. I then had to drive the vehicle for about 60 miles to get the computer to send me a new batch of codes after a reset. Post-reset codes are same as above.
I cleaned the MAF -again- just to rule out possible dirty sensor, no change.
Let me know if there's something I'm missing. Tomorrow I plan on pulling the Fuel Pump Driver Module just to rule that out.
Quick background on recent work:
Oil Change, New Air Filter, Transmission Rebuild, New Spark Plugs, New Plug Wires, Coolant Flush, New Lifters, Cleaned MAF, Injector Cleaning + O-rings, Connecting Rod Bearings
The vehicle drove beautifully for about a week - when driving home I began to notice a slight hesitation on throttle which grew rapidly worse over the course of 5 miles. I arrived at my home and checked the codes, and returned the following:
P1233, Fuel Pump Driver Module Disabled or Offline
P1406, DPFE Sensor Circuit Downstream Hose (Already remedied, I had broken off a stem and had yet to repair this at the time)
P0300, Random Misfire
P0303, Cyl 3 Misfire
P0304, Cyl 4 Misfire
I checked the inertia switch: Not tripped, receiving and sending 12v.
I then gave a good solid... 'tap' to the CCRM, the engine levelled out for a moment before going rough. I assumed at this point it was a faulty relay. I soldered in a new relay (confirmed 100% exact match) and threw it all back together.
Now, there's an aggressive misfire on 'Random' cylinders... and new codes.
P0316, Misfire Detected On Startup, First 1000 Revolutions
P0300
P0303
P0304
P0113 Intake Air Temperature Sensor Circuit High Input
Now, P0113 I can't make any sense of. The information I have found leads me to believe that the MAF is a combination of IAT and MAF on this vehicle. Disconnecting it and restarting the engine resulted in no noticeable change, no new codes. Restarting the engine with the sensor reconnected results in no change, and no new codes. I then had to drive the vehicle for about 60 miles to get the computer to send me a new batch of codes after a reset. Post-reset codes are same as above.
I cleaned the MAF -again- just to rule out possible dirty sensor, no change.
Let me know if there's something I'm missing. Tomorrow I plan on pulling the Fuel Pump Driver Module just to rule that out.