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03-20-6
  • DRIVEABILITY - DEDICATED COMPRESSED NATURAL GAS (CNG) VEHICLES - 4.6L AND 5.4L ENGINE - ROUGH IDLE, HARD START OR NO START WHEN COLD - LOSS OF POWER - LEAN FUEL DTC'S - RESTRICTED CATALYTIC CONVERTER
  • ENGINE - DEDICATED COMPRESSED NATURAL GAS (CNG) VEHICLES - 4.6L AND 5.4L ENGINE - ROUGH IDLE, HARD START OR NO START WHEN COLD - LOSS OF POWER - LEAN FUEL DTC'S - RESTRICTED CATALYTIC CONVERTER
Publication Date: October 1, 2003

FORD:
1996-2003 CROWN VICTORIA
1997-2003 E SERIES, F-150

ISSUE:

Some dedicated CNG vehicles may exhibit various driveability conditions due to a loss of injector performance, resulting from fuel quality. The conditions (in approximate order of their occurrence) include:

  • Loss Of Power At Heavy Load
  • DTC Codes For Lean Fuel
  • Rough Idle
  • Hard Start
  • Plugged Catalytic Converter
  • No Start
  • NOTE: THE HARD START AND NO START TYPICALLY WILL OCCUR AT THE FIRST START OF THE DAY AND DURING THE FIRST COLD DAYS OF FALL OR WINTER.

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