Engine - MIL ON Misfire DTC's Stored

NUMBER: 18-18-99

GROUP: Vehicle Performance

DATE: Aug. 13, 1999

SUBJECT:
Multiple Cylinder Misfire Due to Carbon Deposits

OVERVIEW:
This bulletin involves verifying PCM software and installing revised valve springs.

MODELS:

1997 - 1999 (PL) Neon

NOTE:
THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 2.0L DOHC ENGINE BUILT PRIOR TO NOVEMBER 3, 1998 (MDH 11O3XX).

SYMPTOM/CONDITION:

Engine roughness/misfire usually only apparent on initial cold engine start. May be accompanied by a MIL illumination for SINGLE or MULTIPLE CYLINDER MISFIRE DTC's.

DIAGNOSIS:
Using the Mopar Diagnostic System (MDS2) and/or the Diagnostic Scan Tool (DRB III(R)) with the appropriate Diagnostic Procedures Manual, verify all engine/transmission systems are functioning as designed. If non-misfire related DTC's are present, record them on the repair order and repair as necessary before proceeding further with this bulletin. If SINGLE or MULTIPLE CYLINDER MISFIRE DTC's are present, follow all misfire diagnostics listed in the appropriate Diagnostic Procedures Manual and verify TSB 18-47-98 has been completed before performing this Repair Procedure.

PARTS REQUIRED:

16 04777555AB Valve Spring

REPAIR PROCEDURE:

1. Replace all Valve springs as described on page 9-83 of the 1999 Neon service manual (Publication No. 81-270-0125).

NOTE:
ALL VALVE SPRINGS MUST BE REPLACED ASA SET WHEN INSTALLING THE REVISED SPRING. FOR REFERENCE, THE REVISED SPRING IS 49.3 MM (+/- 1 MM) IN LENGTH WITH A SINGLE GREEN OR YELLOW STRIPE.

POLICY: Reimbursable within the provisions of the warranty.

TIME ALLOWANCE:

Labor Operation No: 09-95-20-93 3.8 Hrs.

FAILURE CODE: P8 - New Part