W350 1 Ton Pickup 4WD V8-360 5.9L VIN 1 4-bbl (1988)
Air Cleaner Housing: All Technical Service Bulletins
Vapor Containment Door - Hard Start/Black Smoke
Models
All 1985-1988 B, D, W, AD & AW With 5.9L Engine & Vapor Containment Door
Subject
Hard Hot Starts
Index
DRIVEABILITY
Date
August 17, 1987
No.
18-14-87 (C12-18)
P-2872
SYMPTOM/CONDITION
Long engine crank times and black smoke coming from the exhaust following a hot engine shut down. This condition may occur if starting is attempted
from 10 to 45 minutes after engine down, and affects hot starting in all temperatures..
PARTS REQUIRED
1
Bolt - M6 x 1 x 14
PN 5240437
1
Nut - M6 x 1
PN 6500274
1
Authorized Modification Label
PN 4275086
Parts to be ordered separately.
REPAIR PROCEDURE
This repair involves installing a bolt to hold the vapor containment door open. This reduces the build up of fuel vapors inside the air cleaner.
1.
While holding the vapor containment trap door open, drill a 1/4" hole through both the round dimple of the air cleaner snorkel and the trap door.
The vapor containment trap door is located in the air cleaner snorkel that has the heated air vacuum motor. For "B" model trucks it is on the
passenger side, and for "D" model trucks it is located on the driver's side.
