TP-6903 5/16a Table of Contents
Table of Contents
Product Identification Information ............................................................................................................................................ 2
Table of Contents ....................................................................................................................................................................... 3
Safety Precautions and Instructions ........................................................................................................................................ 5
Introduction ......................................................................................................................................................................... 9
Service Assistance................................................................................................................................................................... 10
Section 1 Fuel System Overview ................................................................................................................................. 11
1.1. Introduction ....................................................................................................................................... 11
1.2. Air-Fuel Mixer .................................................................................................................................... 13
1.3. Charge Air Cooler (KG2204T only) .................................................................................................. 13
1.4. Coolant Temperature Sensor ............................................................................................................ 13
1.5. Crankshaft Position (CKP) Sensor .................................................................................................... 14
1.6. Electronic Control Module ................................................................................................................. 14
1.7. Fuel Control Valve ............................................................................................................................. 15
1.8. Fuel Pressure Regulator ................................................................................................................... 15
1.9. Fuel Shut-Off Valves ......................................................................................................................... 16
1.10. Heated Exhaust Gas Oxygen (HEGO) Sensor .................................................................................. 16
1.11. Ignition System .................................................................................................................................. 17
1.12. MAP and TMAP Sensors .................................................................................................................. 17
1.13. Oil Pressure Sender .......................................................................................................................... 18
1.14. Throttle Body ..................................................................................................................................... 19
1.15. Throttle Position (TP) Sensor ............................................................................................................ 19
1.16. Turbocharger (KG2204T only) .......................................................................................................... 20
1.17. Turbocharger Oil Lines (KG2204T only) ........................................................................................... 20
Section 2 Diagnostic Troubleshooting Codes ........................................................................................................... 21
2.1. Introduction ....................................................................................................................................... 21
2.2. Spectrum Diagnostic Scan Tool (DST) ............................................................................................. 21
Section 3 Fuel System Troubleshooting .................................................................................................................... 45
3.1. Fuel System Intermittent Problems ................................................................................................... 47
3.2. Fuel System Basic Checks ................................................................................................................ 47
3.3. No Start ............................................................................................................................................. 49
3.4. Hard Start .......................................................................................................................................... 50
3.5. Cuts Out and Misses ......................................................................................................................... 51
3.6. Hesitation, Sag, or Stumble ............................................................................................................... 52
3.7. Backfire ............................................................................................................................................. 53
3.8. Lack of Power or Sluggishness ......................................................................................................... 54
3.9. Poor Fuel Economy ........................................................................................................................... 55
3.10. Rough, Unstable, or Incorrect Engine Speed and Stalling ................................................................ 56
3.11. Hunting and Surging ......................................................................................................................... 57
Section 4 Electrical System and Sensor Troubleshooting ....................................................................................... 59
4.1. Introduction ....................................................................................................................................... 61
4.2. Powering the ECM ............................................................................................................................ 61
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