F 250 2WD Pickup V6-4.2L VIN 2 (1998)
7.
Low FAP due to lockoff fault.
8.
LPG fuel filter in backward.
COMPUVALVE PRE-REPLACEMENT CHECKLIST
1.
Check communication ability with EEC, AFCM/compuvalve and VCL and compuvalve. Follow the Powertrain Control/Emissions Diagnosis
(PC/ED) Workshop Manual procedures for the appropriate vehicle.
2.
Check MAP line. Follow normal diagnostic methods and visual checks.
3.
Check harness and connection integrity. Follow normal diagnostic methods, basic circuit checks and harness connections.
4.
Check current bi-fuel EEC calibration code. Refer to WDS.
5.
Check fuel gauge with fuel selector switch in ALT position for fuel level.
6.
Check power to compuvalve. Power to the compuvalve is indicated by the following fuel selector switch light status: On steady = OK, On then Off
or Flashing (regular and irregular) indicated fault.
7.
Check that the arrow on the LPG fuel filter is pointing in the direction of fuel flow.
8.
Check base vehicle. Run vehicle in gas mode (e.g., borderline secondary ignition). Follow normal diagnostic methods.
9.
Check other applicable TSBs and special service messages.
10.
Verify ALT fuel switch status. Refer to Section 1 of the appropriate PC/ED Workshop Manual.
OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: INFORMATION ONLY
OASIS CODES: 490000, 602300, 603300, 608000, 609000, 611000, 623000, 690000, 698298
