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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSPLYMOUTH1985HORIZON L4-135 2.2L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULETECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSECM - NO START OR HARD START
1985 Plymouth Horizon L4-135 2.2L SOHC
ECM - No Start or Hard Start
1985 Plymouth Horizon L4-135 2.2L SOHCSECTION ECM - No Start or Hard Start
Models
1985 Vehicles Equipped With 2.2L Turbocharged Engine - All Emission Packages & 2.2L EFI Engines With Federal Emission Package
Subject
No Start or Hard Start
Index
DRIVEABILITY
Date
December 9, 1985
No.
18-44-85
P-4545-C
SYMPTOM/CONDITION
A "no start" or "hard start" condition may occur in low ambient temperatures (32~ F or lower) while at altitudes of 5000 feet or higher.
DIAGNOSIS
To be sure all systems are operating as designed, use the appropriate
Driveability Test Procedure. If no problems are found, install the appropriate logic module listed below.
PARTS REQUIRED
1 Authorized Modification Label PN 4275086
REPAIR PROCEDURE
The following logic modules have a revised start fuel schedule incorporated to lean out fuel delivery based on barometric pressure:
Logic Module No.
1985 2.2L EFI Manual - Federal Emissions 5227238
1985 2.2L EFI Automatic - Federal Emissions 5227241
1985 2.2L Turbo Manual - All Emissions 5227243
1985 2.2L Turbo Automatic - All Emissions 5227245
Type in Authorized Modification Label, PN 4275086, as shown in Figure 1.
POLICY: Reimbursable within the provisions of the warranty
TIME ALLOWANCE:
Labor Operation No. 08-14-06-91 0.3 Hrs.
FAILURE CODE: AM - Authorized Modification
1985 Vehicles Equipped With 2.2L Turbocharged Engine - All Emission Packages & 2.2L EFI Engines With Federal Emission Package
Subject
No Start or Hard Start
Index
DRIVEABILITY
Date
December 9, 1985
No.
18-44-85
P-4545-C
SYMPTOM/CONDITION
A "no start" or "hard start" condition may occur in low ambient temperatures (32~ F or lower) while at altitudes of 5000 feet or higher.
DIAGNOSIS
To be sure all systems are operating as designed, use the appropriate
Driveability Test Procedure. If no problems are found, install the appropriate logic module listed below.
PARTS REQUIRED
1 Authorized Modification Label PN 4275086
REPAIR PROCEDURE
The following logic modules have a revised start fuel schedule incorporated to lean out fuel delivery based on barometric pressure:
Logic Module No.
1985 2.2L EFI Manual - Federal Emissions 5227238
1985 2.2L EFI Automatic - Federal Emissions 5227241
1985 2.2L Turbo Manual - All Emissions 5227243
1985 2.2L Turbo Automatic - All Emissions 5227245
FIGURE 1:
Type in Authorized Modification Label, PN 4275086, as shown in Figure 1.
POLICY: Reimbursable within the provisions of the warranty
TIME ALLOWANCE:
Labor Operation No. 08-14-06-91 0.3 Hrs.
FAILURE CODE: AM - Authorized Modification
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.