Engine - Reduced Power/RPM Dip/Idle Surge

Article No.
01-24-3

12/10/01

DRIVEABILITY - BI-FUEL - REDUCED ENGINE
POWER, RPM DIP OR IDLE SURGE GREATER THAN
200 RPM IMMEDIATELY FOLLOWING TIP-IN FROM A
STOP - OPERATING IN ALTERNATIVE FUEL MODE -
VEHICLES EQUIPPED WITH 5.4L BI-FUEL ENGINE
ONLY

FORD:
2000-2001 F-150

This article is being republished in its entirety to update the Calibration Information Chart.

ISSUE
Some Bi-Fuel equipped vehicles may exhibit reduced engine power, RPM dip or idle surge greater than 200 RPM immediately following tip-in, from a stopped position, using less than 1/4 throttle application, while operating on alternative fuel mode only. This may be caused by the calibration of the Powertrain Control Module (PCM).





ACTION
Verify the condition. If normal diagnostics cannot pinpoint the condition, reprogram the PCM to the latest level calibration. Refer to the PCM Calibration Information chart for details.

SERVICE INFORMATION





Obtain an Authorized Modifications Decal (FPS 8262 - obtainable through DOES II, 25/pkg) and list the date, dealer number, and summary of modifications performed. Select a prominent place adjacent to the Vehicle Emission Control Information Decal suitable for installing the Authorized Modifications Decal. Clean the area, install the decal, and cover it with a clear plastic decal shield.

OTHER APPLICABLE ARTICLES: 00-06-11
SUPERSEDES: 01-15-3
WARRANTY STATUS: INFORMATION ONLY
OASIS CODES: 607000, 607400, 607500, 617400, 618400, 619400