My sons Isuzu Rodeo is having a misfire problem according to the odb2 scan. It has new plugs, I tried swapping the coils to different cylinders and it stays a misfire on cylinder 2. If I clear the code sometimes it runs several days just fine and then it will start again. Could the fuel injection be causing the problem? I notice in this scan the bank 1 and bank 2 are alot different, not sure if that means anything. Anyone have any ideas


VIN: 4S2CK58VXT4326300
Year: 1996
Manufacturer: American Isuzu Motors Inc.
Make: Isuzu
Model: Rodeo
Engine Type: V6, 3.2L; SOHC
Tranmission: Automatic
Trim Level: LS; S
License Plate: ACZ771
Mileage: 122500



=== Stored Error Code(s) ===
Error Code: P0302
Possible Causes:


=== Pending Error Code(s) ===
Error Code: P0302
Possible Causes:



Freeze Frame Information:
1. DTC for which Freeze Frame was Stored - P0302.
2. Fuel System 1 Status - Closed Loop.
3. Fuel System 2 Status - Closed Loop.
4. Calculated LOAD Value - 1.18 %.
5. Engine Coolant Temp - 192.20 °F.
6. Short Term Fuel Trim - Bank 1 - 1.56 %.
7. Long Term Fuel Trim - Bank 1 - -2.34 %.
8. Short Term Fuel Trim - Bank 2 - 6.25 %.
9. Long Term Fuel Trim - Bank 2 - 5.47 %.
10. Intake Manifold Absolute Pressure - 15.40 Inhg.
11. Engine RPM - 1,747.00 Rpm.
12. Vehicle Speed Sensor - 9.94 Mph.
13. Air Flow Rate Mass Air Flow Sensor - 2.47 Lb/Min.
14. Absolute Throttle Position - 5.88 %.


Monitor Information:

1. MIL - ON.
2. Misfire Monitoring - Complete.
3. Fuel System Monitoring - Complete.
4. Comprehensive Component Monitoring - Complete.
5. Catalyst Monitoring - Complete.
6. Heated Catalyst Monitoring - Not Supported.
7. Evaporative System Monitoring - Complete.
8. Secondary Air System Monitoring - Not Supported.
9. A/C System Refrigerant Monitoring - Not Supported.
10. Oxygen Sensor Monitoring - Complete.
11. Oxygen Sensor Heater Monitoring - Complete.
12. EGR System Monitoring - Complete.

 

I had the same problem recurring on my '98 that has been on-and-off for the past 2 years. On a stroke of luck it began to misfire (PO301) while idling in the driveway. Mostly it misfires under a load. I began to unpack the right side fuel injector wire harness and as I unpeeled the tape holding the wires together at the front just under the #1 injector it began to fire again. It seems there is a wire broken inside the insulation, which I have yet to locate. Now that it is making contact again I can't find it. My next move is to get a harness off a recycled Rodeo and swap them out.

I dunno if this helps you or not, but your story was sounding way to familiar!

Good Luck,
John