Voyager L4-156 2.6L SOHC (1984)
Fuel Pressure Regulator: Customer Interest
Fuel System - Engine Sag/Poor Performance
Models
1984-1987 Caravan, Ram Van & Voyager Models Equipped With 2.6L Engine
Subject
Sag and/or Poor Performance Due to Fuel Foaming
Index
DRIVEABILITY
Date
September 22, 1986
No.
18-48-86
P3393
This bulletin supersedes Technical Service Bulletin 18-05-85 REV A for front wheel trucks equipped with 2.6L engine. This bulletin allows the fuel
foaming package to be installed on 1987 models with exception to 1986 and 1987 altitude models noted below.
NOTE:
1986 AND 1987 MODEL YEAR HIGH ALTITUDE VEHICLES ALREADY CONTAIN A PRESURE REGULATOR ON THE
DASH PANEL AND A 3-PORT FUEL RESERVOIR NEAR THE CARBURETOR. IN THESE CASES, DO NOT INSTALL
THE PRESSURE REGULATOR AND FUEL RESERVOIR PACKAGE, PN 4342938.
SYMPTOM/CONDITION
Engine sags and/or exhibits poor performance following a hot soak restart. This condition occurs when cool incoming fuel meets the hot fuel in the
carburetor fuel bowl, which creates an over rich condition. Engine will start (unloading technique may be necessary).
DIAGNOSIS
Engine must be fully warmed up. (Fuel foaming does not affect cold engine driveability.) The following are characteristics of fuel foaming:
^
Occurs primarily after hot soak restart or prolonged idle only on medium to heavy acceleration.
^
Sag is due to rich fuel mixture.
^
Black smoke at tailpipe.
^
Fuel pressure is normal.
^
Raw fuel at carburetor air horn.
^
Good accelerator pump discharge.
^
Will immediately start (unloading technique may be necessary).
PARTS REQUIRED
PRESSURE REGULATOR & FUEL RESERVOIR PACKAGE PN 4342938
Contains:
1 -
Pressure Regulator Assembly
PN 4307381
1 -
Pressure Regulator Bracket
PN 4306972
3 -
Screw - Bracket to Body
PN 6031991
2 -
Screw - Pressure Regulator to Bracket
PN 6033066
1 -
Fuel Reservoir Assembly
PN 4307358
8 -
Hose Clamp - 1/4"
PN 6500650
1 -
Y Connector & 3-Hose Assembly
PN 4307384
1 -
Hose Assembly - Reservoir to Pressure Regulator (28.5")
PN 4307382
1 -
Hose Assembly - Pressure Regulator to Carburetor (34")
PN 4307383
1 -
Clip Hose to Valve Cover
PN 4307242
1 -
Tie Wrap
PN 6015945