TNGuy

Hello:

I have an '07 w/ a 5.4 that has just started idling very roughly. I put my scanner on it and it is giving the following codes:

2 - Confirmed codes:
- P0208 - Cylinder 8 Injector "A" Circuit
- P0308 - Cylinder 8 Misfire Detected

4 - Pending Codes:
- P0208 - Cylinder 8 Injector "A" Circuit
- P0300 - Random/Multiple Cylinder Misfire Detected
- P0301 - Cylinder 1 Misfire Detected
- P0308 - Cylinder 8 Misfire Detected

5 -Powertrain Control Module codes
- P0208 - Cylinder 8 Injector "A" Circuit
- P0300 - Random/Multiple Cylinder Misfire Detected
- P0301 - Cylinder 1 Misfire Detected
- P0308 - Cylinder 8 Misfire Detected
- P0316 - engine Misfire Detectged on Startup (First 1000 Revolutions)

Freeze Frame report:

02 DTC that caused freeze frame data - P0308
01 Monitor Status Since DTCs Cleared - 0
Fuel System Status:
03 Closed loop - using all oxygen sensor(s) as feedback for fuel control
04 Calculated Engine Load Value - 24.3%
05 Engine Coolant Temperature - 73*C,163*F
06 Short Term Fuel Trim Bank 1 - 3.9%
07 Long Term Fuel Trim Bank 1 - -3.1%
08 Short Term Fuel Trim Bank 2 - 15.6%
09 Long Term Fuel Trim Bank 2 - -2.3%
0C Engine RPM - 652
0D Vehicle Speed - 0km/h,0 MPH
0E Timing Advance for #1 cylinder - 10.5*
0F Intake Air Temperature - 23*C,73*F
10 Mass Air Flow Rate - 5.78 g/s,0.8 lb/min
11 Absolute Throttle Position - 13.7%
14 O2 Bank 1 - Sensor 1 - Short Term Fuel Trim - 3.9%
14 O2 Bank 1 - Sensor 1 - Oxygen Sensor Voltage - 0.095V
15 O2 Bank 1 - Sensor 2 - Short Term Fuel Trim - 99.2%
15 O2 Bank 1 - Sensor 2 - Oxygen Sensor Voltage - 0.685V
18 O2 Bank 2 - Sensor 1 - Short Term Fuel Trim - 15.6$
14 O2 Bank 2 - Sensor 1 - Oxygen Sensor Voltage - 0.055V
15 O2 Bank 2 - Sensor 2 - Short Term Fuel Trim - 99.2%
15 O2 Bank 2 - Sensor 2 - Oxygen Sensor Voltage - 0.055V
1F Run time Since Engine Start - 89 seconds
22 Fuel Rail Pressure (relative to manifold vacuum) - 265.756 kPa,38.5 PSI
2E Commercial Evaporative Purge - 17.6%
2F Fuel Level Input - 94.1%
30 # of Warm-ups Since Codes Cleared - 45#
31 Distance Traveled Since Codes Cleared - 2768km,1720 mile
32 Evap. System Vapor Pressure 0.0 Pa,0.000 inH2O
33 Barometric Pressure - 97 kPa,28.6 in Hg
3C Catylist Temperature Bank 1 - Sensor 1 - 422.9 *C,793.2*F
3D Catylist Temperature Bank 2 - Sensor 1 - 422.9 *C,793.2*F
41 Monitor Status this Drive Cycle - 0
42 Control Module Voltage - 14.271V
43 Absolute Laod Value - 16.5%
44 Commanded Equivalance Ratio - 0.999
45 Relative Throttle Position - 0.8%
46 Ambient Air Temperature - 11*C,52*F
47 Absolute Throtle Position B - 16.1%
49 Accelerator Pedal Postiion D - 20.0%
4A Accelerator Pedal Postion E - 29.8%
4B Accelerator Pedla Position F - 19.2%
4C Commanded Throttle Actuator 1.6%


Any help in how best to proceed based upon the above information will be greatly appreciated. Thank you.


David

TNGuy

I should also add, though I'm not sure of any relevancy, that the truck had sat unused for 12 days. Then, upon first start-up the idle issue began.


David

techrep

iTrader: (1)

Have you done any troubleshooting ? Like swapping COP's/ injectors/ plugs from #8 to #7 clear DTC's and see if the codes follow ? Another thing to inspect your FPDM for security sense you say it was sitting.

TNGuy

techrep:

Thank you for your response. It turns out in my case that the culprit was a faulty fuel injector electrical connector. Decided to change out the injector while in there. Idles fine now - and all codes have cleared.


David

techrep

iTrader: (1)

Nice .. how did you find that ?