Econoline E350 1 Ton V8-5.4L Prop SOHC VIN Z (1998)
Fuel Rail: Customer Interest
Compuvalve - Rough Idle Speed/Stalls at Idle Speeds
Article No.
00-10-4
05/15/00
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IDLE - ROUGH IDLE SPEED - BI-FUEL VEHICLES
ONLY
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STALL - DURING IDLE SPEEDS - BI-FUEL
VEHICLES ONLY
FORD:
1998-1999 E-250, E-350, F-150, F-250 LD
ISSUE
On some vehicles vaporizers with GFI model numbers Z5-1OO or Z7-1OO, may experience internal component deterioration due to fuel contamination.
ACTION
The following procedures are provided to expedite diagnostics and to determine if component debris (caused by fuel contamination) has impeded the
operation of the Vaporizer, Compuvalve, Fuel Rails, and/or Injector Sleeves. Refer to the following Service Procedure for details.
SERVICE PROCEDURE
Perform all preliminary diagnostics as indicated in the Workshop Manual/Workshop information CD to ensure that the base vehicle is operational. Even
a weak ignition system may cause a driveability concern in ALT fuel while not affecting gasoline. Use the NGS to verify that the PCM calibration
matches the current bi-fuel calibration code in the following Calibration Chart.
Confirm and record the model number of the vaporizer for the vehicle. On the F-Series truck, a mirror can be used to read the model number and on the
Econoline van, unbolt the vaporizer from the bracket to read the model number.
