Fulltext TSBs

Technical Service Bulletins

TSB
01-15-2
  • DRIVEABILITY – BI-FUEL – NO START IN BI-FUEL MODE – ALT FUEL LIGHT ON – VEHICLES EQUIPPED WITH BI-FUEL ENGINE ONLY
Publication Date: JULY 20, 2001

FORD:
1996-2000 CONTOUR
1996-1999 F-250 HD, F-250 LD
1996-2001 E SERIES, F-150
1999-2001 SUPER DUTY F SERIES

ISSUE:

Some Bi-Fuel vehicles may exhibit a crank no start with the Alt fuel light on. This may lead to unnecessary replacement of the compuvalve when confirming MAP sensor operation, while applying vacuum. The MAP sensor may not respond to changes in applied vacuum if the system does not see a TACH signal.

ACTION:

This article can be used as a supplement to Pin Point Test AD in the Bi-Fuel Workshop Manual. Monitor AFS/AFCM MAP PID while operating in the gasoline mode. Refer to the following Service Information for details.

SERVICE INFORMATION

  1. Start the bi-fuel vehicle in the gasoline mode.
  2. Monitor the AFS MAP PID
    1. For the 1996, 1997 and 1998 bi-fuel vehicles, monitor the AFS MAP PID using the NGS and GFI card and cable at the VCL J108 diagnostic connector.
    2. For the 1999, 2000 and 2001 bi-fuel vehicles, monitor the AFCM MAP PID using the NGS at the OBD II diagnostic connector.
  3. Idle the engine, for the 1996, 1997 and 1998 bi-fuel vehicles, the MAP PID reading should be 8-12 in. Hg. Idle the engine, for the 1999, 2000 and 2001 bi-fuel vehicles, the MAP PID reading should be 4-6 PSI.
    1. Snap the throttle, for the 1996, 1997 and 1998 bi-fuel vehicles, the MAP PID reading should reach as high as 22-30 in. Hg and as low as 4 in. Hg before settling to idle values.
    2. Snap the throttle, for the 1999, 2000 and 2001 bi-fuel vehicles, the MAP PID reading should reach as high as 12-15 PSI and as low as 2 PSI before settling to idle values.
  4. If the AFS/AFCM MAP PID changed with the engine load/speed, then continue with normal diagnostics. If the AFS/AFCM MAP PID did not change with engine load/speed, then replace the compuvalve.

OTHER APPLICABLE ARTICLES:

NONE

WARRANTY STATUS:

Information Only

OASIS CODES:

601300, 602300, 603300