Conquest TSI L4-2555cc 2.6L SOHC Turbo (1986)
Powertrain Control Module: Customer Interest
ECU - Rough Engine Idle
Models
1985-1986 Conquest Vehicles Equipped With Intercooler
Subject
Rough Idle
Index
DRIVEABILITY
Date
November 24, 1986
No.
18-52-86
P-4290
SYMPTOM/CONDITION
Rough idle when vehicle is at normal operating temperature.
DIAGNOSIS
Be sure vehicle is operating to specifications using the ECI checker and Test Procedure. If vehicle still exhibits condition, proceed with this repair.
PARTS REQUIRED
1
Computer Kit*
PN MD117387
1
Authorized Modification Label
PN 4275086
*Computer Kit PN MD117387 includes ECU PN MD117208 and a Connector Assembly PN MD117384.
REPAIR PROCEDURE
This repair procedure involves replacing the ECU with a modified ECU.
NOTE:
1985 CONQUEST MODELS WITH INTERCOOLER WERE BUILT TWO
(2)
DIFFERENT WAYS, DEPENDING ON DATE OF MANUFACTURE. THE DIFFERENCE IS IN THE HARNESS AT THE ECU
(ELECTRONIC CONTROL, UNIT). THERE WERE TWO (2) METHODS OF CONNECTING A MODULATOR USED IN PRODUCTION
TO CORRECT A SURGE. THIS REPAIR WILL INCORPORATE THAT CORRECTION AND REQUIRE THE REMOVAL OF THE
PRODUCTION MODULATOR AND HARNESS. 1986 VEHICLES ONLY REQUIRE THE REPLACEMENT OF THE ECU.
