For 1990-2009 cars

# Rough Engine Idle, Misfire, Possible DTC P0300 (Replace Spark Plug Boot Assem)

Subject: | Rough Engine Idle, Misfire, Possible DTC P0300 (Replace Spark Plug Boot Assembly)

Models: | 1999 Chevrolet Malibu

| 1999-2000 Chevrolet Cavalier

| 1999-2000 Oldsmobile Alero

| 1999-2000 Pontiac Grand Am, Sunfire

| 1999-2000 Toyota Cavalier

| with 2.4 L Engine (VIN T -- RPO LD9)

### Condition

Some customers may comment on a rough engine idle and/or misfire. The Check Engine Light (CEL) may or may not be illuminated, and DTC P0300 may or may not be set under rough idle conditions.

### Cause

Condition may be due to a missing spark plug boot spring.

### Correction

(1) | Spark Plug Boot Spring

Check for presence of the spark plug boot spring (1) by removing each boot and checking for spring presence at the boot to coil tower connection. If the spring is missing, replace the spark plug boot assembly.

### Parts Information

Part Number | Description
--- | ---
12132224 | Spark Plug Boot Assembly

Parts are currently available from GMSPO.

### Warranty Information

For vehicles repaired under warranty, use:

Labor Operation | Description | Labor Time
--- | --- | ---
J4226 | Spark Plug -- Replace | Use Published Labor Time
J4403 | Integrated Direct Ignition system - Repace spark plug connector kit | Use Published Labor Time