Charger L4-135 2.2L SOHC VIN 8 2-bbl HP (1986)
Powertrain Control Module: Customer Interest
ECU - Surge/Bucking While Cruising
Models
1986-1987 "L" Body Equipped With 2.2L 2BBL Engine & Manual Transaxle
Subject
Warm Surge & Bucking
Index
DRIVEABILITY
Date
June 1, 1987
No..
18-12-87 (C9-18)
P-1964
SYMPTOM/CONDITION
A surge and/or bucking condition may be noticed during a light throttle, high rpm cruise (as in stop and go traffic, parking lot cruise, etc.).
The following repair applies to those models listed with Federal or California emissions package. It does not apply to those vehciles equipped with the
2.2L 2BBL high output engine (designated by an "8" in the eighth character of the VIN).
DIAGNOSIS
With vehicle at full operating temperature, install a tachometer (if vehicle is not equipped with tach) and road test vehicle. Accelerate and hold engine
between 2000-3000 rpm in second gear. Then decelerate slightly (without closing throttle). If vehicle exhibits a surge while holding between 2000-3000
rpm, or starts to buck during a slight deceleration, perform the following repair procedure.
PARTS REQUIRED
1
ESA Module
PN 5233524
1
Authorized Modification Label
PN 4275086
REPAIR PROCEDURE
This repair will reduce the above conditions by installing a revised ESA module to allow a slightly richer fuel mixture during periods of high vacuum and
high rpm. ESA module, PN 5233524, also includes all of the prior improvements made to the original ESA module for cold start driveway dieouts and
cold sag on acceleration.