Dakota 2WD V6-239 3.9L (1987)
Idle Speed Vacuum Solenoid Valve: Customer Interest
Vacuum Solenoid - Intermittent/Constant High Idle Speed
Models
Early 1987 Dakota Trucks With 3.9L Engine
Subject
Intermittent or Constant High Curb Idle Speed
Index
DRIVEABILITY
Date
December 29, 1986
No.
18-59-86
P-4536
This bulletin applies only to Dakota trucks built prior to MDH 07-28-08. Vehicles built after this can be identified by the presence of a diverter valve
mounted on a bracket near the air pump.
SYMPTOM/CONDITION
Vehicles without a diverter valve may exhibit an intermittent or constant curb idle speed that is higher than the specified rpm.
DIAGNOSIS
Disconnect and plug the vacuum hose at the carburetor vacuum kicker. If this corrects the condition, proceed with the repair procedure.
PARTS REQUIRED
Driveability Kit, PN 4419444
Consists of:
1
Solenoid Jumper Wiring Assembly
PN 4482025
1
Tie Wrap
PN 6015756
1
Authorized Modification Label
PN 4275086
REPAIR PROCEDURE
This procedure consists of installing a diode jumper wiring assembly between the ASRV solenoid and the vacuum electric switch. This will prevent
electrical feedback to the electronic spark advance module, which causes the carburetor throttle kicker to be incorrectly energized (extended).
