F 150 4WD Pickup V8-5.4L CNG VIN M (2001)
2.
Verify that the condition has been corrected.
3.
If the condition has been corrected, the repair action is complete. If the condition has not been corrected, continue with Step 4.
4.
Monitor:
a.
Use NGS or WDS to monitor the ADPTCTL (Fuel Adaptive Control) PID from the AFCM.
b.
Turn off all accessories. e.g. heated rear screen, radio, lights, air conditioning, and passenger compartment fan (if equipped).
c.
With the foot brake fully applied, idle the vehicle in Drive and apply a full power steering load. Release the steering wheel and allow engine
idle to stabilize.
d.
With the foot brake fully applied, idle the vehicle in Drive and apply a full power steering load for the second time. Note the value of the
ADPTCTL PID when the steering is at full load.
e.
Release the steering wheel and allow engine idle to stabilize. Note the value of the ADPTCTL PID.
f.
If the ADPTCTL PID did not change following the second full power steering load application and vehicle does stall, follow normal
Workshop Manual diagnostic procedures to resolve the condition. If the ADPTCTL PID changes more than +/- 15 following the second full
power steering load application, continue with Step 5.
5.
Compuvalve:
a.
For the 2000 CNG bi-fuel vehicle, replace the compuvalve using the Ford removal and installation - Compuvalve Natural Gas procedure as
specified in the 2000 F150 Workshop Information section 303-04E. Also, replace the MAP line tube assembly as specified in Step 6.
b.
For the 2001 CNG bi-fuel vehicle, replace the compuvalve using the Ford removal and installation - Compuvalve Natural Gas procedure as
specified in the 2001 Truck Workshop Information section 303-04D.
6.
Map Line:
a.
Locate MAP line tube assembly. One end is connected to the MAP barb of the compuvalve, the other end is a TEE going into the canister
purge delivery line (to the back side of the intake manifold inlet) and to the rear of the throttle body (Figure 1).
b.
Remove the MAP line tap assembly. Remove the hoses off each end of the TEE and off the barb of the compuvalve.
c.
Install new MAP line tap assembly. Reconnect TEE and to the barb of the compuvalve. Route the MAP line so that it does not come in
contact with the bulkhead behind the engine (Figure 1).
