EVAP Purge Signal Delay valve - Engine Stalling

Article No.
83-3-29

STALLS DURING TRAFFIC STOPS AFTER EXTENDED IDLING IN HIGH TEMPERATURES - 3.8L ENGINE

LIGHT TRUCKS:
1983 F100

CALIBRATIONS:
3-55D, 3-56D

If one of the above mentioned vehicle/engine calibrations stalls during traffic stops after a long idle in hot weather, service by modifying the purge control system.

Figure 32:

Figure 33:

Using Figure 32 as a guide for automatic transmission vehicles (calibration 3-56D), and Figure 33 as a guide for (calibration 3-55D) manual transmission vehicles, remove the EVAP purge signal delay valve. Replace the valve with a straight vacuum hose connector.





Obtain an Authorized Modifications decal and list the date, dealer number and summary of alterations 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: None
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual.

OPERATION: GM

TIME: "Actual Time" as defined in the Warranty and Policy Manual.

DLR. CODING:
Basic Part No. Code:
DRIVE H6