Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSPLYMOUTH1985HORIZON L4-135 2.2L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULETECHNICAL SERVICE BULLETINSCUSTOMER INTERESTECM - POOR DRIVEABILITY ABOVE 3,000 FOOT ELEVATION
1985 Plymouth Horizon L4-135 2.2L SOHC
ECM - Poor Driveability Above 3,000 Foot Elevation
1985 Plymouth Horizon L4-135 2.2L SOHCSECTION ECM - Poor Driveability Above 3,000 Foot Elevation
85chrysler15
Models
1985 2.2L EFI With Federal or California Emission System - Automatic Transmission Only
Subject
Sag & Hesitation on Light to Medium Acceleration
Index
DRIVEABILITY
Date
April 1, 1985
No..
18-21-85
P-1068-C
SYMPTOM/CONDITION
A condition may exist on subject model vehicles of sag or hesitation under light to medium tip-in acceleration at attitudes above 3,000 feet above sea level.
NOTE: THIS PROCEDURE APPLIES TO VEHICLES WITH 2.2L ELECTRONIC FUEL INJECTION BUILT PRIOR TO EARLY NOVEMBER, 1984, AND EQUIPPED WITH LOGIC MODULE PN 5226251 OR 5226789 FOR FEDERAL OR PN 5226254 OR 5226792 FOR CALIFORNIA.
DIAGNOSIS/REPAIR
Thorough diagnosis should be performed using the Driveability Test Procedure.
If diagnosis reveals no other cause for the condition, check the part number of the logic module. If equipped with module PN 5226251 or 5226789 (Federal) or PN 5226254 or 5226792 (California), replace the module.
PARTS REQUIRED
1 - Federal Logic Module PN 5226972
1 - California Logic Module PN 5226978
Perform the logic module replacement per the appropriate service manual procedures.
POLICY: Reimbursable within the provisions of the warranty
TIME ALLOWANCE: Refer to Labor Operation Time Schedule for operation and time.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.