N2001 Regulator Disassembly Steps: .. 224 N2001 Disassembled Service .............. 226 Chapter 7. BASIC TROUBLESHOOTING Preliminary Checks.......................................... 227 Before Starting............................................ 227 Visual/Physical check.................................. 227 Basic Troubleshooting Guide ......................... 228 Customer Problem Analysis Sheet .............. 228 Basic Inspection Procedure......................... 229 Connector Inspection Procedure ................. 230 Basic Troubleshooting .................................... 234 Intermittents................................................
234 Corrective Action......................................... 234 Surges and/or Stumbles.............................. 235 Engine Cranking but Will Not Start / Difficult to Start ........................................................ 236 Engine Cranking but Will Not Start / Difficult to Start (cont’d.)........................................... 237 Lack of Power, Slow to Respond / Poor High Speed Performance / Hesitation During Acceleration ............................................ 238 Detonation / Spark Knock............................ 240 Backfire ...................................................... 241 Dieseling, Run-on .......................................
241 Rough, Unstable, Incorrect Idle, or Stalling.. 242 Cuts Out, Misses......................................... 244 Poor Fuel Economy / Excessive Fuel Consumption / LPG Exhaust Smell.......... 245 High Idle Speed .......................................... 246 Excessive Exhaust Emissions or Odors....... 247 Diagnostic Aids for Rich / Lean Operation ... 248 Chart T-1 Restricted Exhaust System Check ... 249 Chapter 8.
ADVANCED DIAGNOSTICS Reading Diagnostic Fault Codes .....................250 Displaying Fault Codes (DFC) from SECM Memory .............................................................250 Clearing Fault (DFC) Codes .............................250 Fault Action Descriptions ................................251 Fault List Definitions ........................................251 Appendix LPG And LPG Fuel Tanks ................................252 Regulatory Compliance....................................256 Special Conditions for Safe Use......................256 Abbreviations ...................................................257 G643(E) Service Manual Index 6