Lebaron Town & Country L4-135 2.2L VIN B 2-bbl (1982)
Technical Service Bulletin # 181486
Date: 860324
Fuel System - Vapor Lock/ Fuel Foaming
Models
1981 & 1982 Aries, Reliant & 1982 Dodge 400, LeBaron With 2.2L Engine
Subject
Vapor Lock/ Fuel Foaming
Index
DRIVEABILITY
Date
March 24, 1986
No.
18-14-86
This bulletin contains instructions and parts list for installing an electric fuel pump, regulator, and fuel reservoir on the subject model vehicles if the
following symptoms or conditions are exhibited.
Symptom/Condition, Diagnosis & Parts Information
SYMPTOM/CONDITION
Vapor Lock - Engine performance is gradually reduced in high ambient temperature or high altitude driving due to a drop in fuel pressure, which starves
the engine for fuel (goes lean). Engine may not start until fuel system components cool off.
Fuel Foaming - 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
Vapor lock and fuel foaming cause similar conditions. The following are characteristics of each condition and should be observed on a fully warmed up
engine. (These conditions do not affect cold engine driveability.)
Vapor Lock
^
Occurs after hot soak, prolonged idle, or highway speeds at any throttle opening.
^
Sag due to lean mixture.
^
No black smoke at tailpipe.
^
Fuel pressure drops to 0.
^
Carburetor air horn dry.
^
No accelerator pump discharge.
^
May not start until engine cools.
^
Engine may not sustain heavy loads.
Fuel Foaming
^
Occurs primarily after hot soak restart or prolonged idle only on medium to heavy acceleration.
^
Sag due to rich fuel mixture.
^
Black smoke at tailpipe.
^
Fuel pressure is normal.
^
Raw fuel at carburetor air horn.
^
Good accelerator pump discharge.
^
Will start immediately (unloading technique may be necessary).
PARTS REQUIRED
1 Fuel Tank & Bi-Metallic Fuel Gauge Package
PN 4411990
Refer to parts list for contents of package.
