For 1990-2009 cars

# Intermittent Chuggle or Fishbite on Light Acceleration or at Highway Speeds with No Diagnostic Trouble Codes (DTCs) (Replace Throttle Position (TPS) Sensor)

Subject: | Intermittent Chuggle or Fishbite on Light Acceleration or at Highway Speeds with No Diagnostic Trouble Codes (DTCs) (Replace Throttle Position (TPS) Sensor)

Models: | 1995-1999 Buick Riviera

| 1995-2004 Buick Regal

| 1995-2005 Buick LeSabre, Park Avenue

| 1997-2005 Buick Century

| 1995-2001 Chevrolet Lumina

| 1995-2002 Chevrolet Camaro

| 1995-2005 Chevrolet Monte Carlo

| 2000-2005 Chevrolet Impala

| 1995-1997 Oldsmobile Cutlass Supreme, Ninety Eight

| 1995-1999 Oldsmobile Eighty Eight

| 1998-2002 Oldsmobile Intrigue

| 1995-2002 Pontiac Firebird

| 1995-2003 Pontiac Grand Prix

| 1995-2005 Pontiac Bonneville

| with 3800 V6 Engine (VIN K -- RPO L36)

### Condition

Some customers may comment on an intermittent chuggle or fishbite on light acceleration or at steady-state highway speeds (typically 80-105 km/h [50-65 mph]) with no PCM DTCs set. This condition may lead the technician to suspect the TCC circuit or torque converter.

### Cause

This condition may be caused by intermittent operation of the Throttle Position (TPS) Sensor.

### Correction

In observed cases, the Tech 2® is not fast enough to consistently detect this condition during a snapshot. It is recommended to use a DVOM set to the min/max recording mode. Connect the DVOM at the TPS connector (positive lead to TPS feedback signal pin and negative lead to TPS ground pin). Duplicate this condition by driving the vehicle. If the voltage dropout (less than 0.45 v) is recorded on the DVOM, replace the TPS sensor and re-evaluate the vehicle before continuing with other driveability or transmission diagnosis.

### Parts Information

Part Number | Description
--- | ---
24504798 | Sensor, Throttle Position (TPS)

### Warranty Information

For vehicles repaired under warranty, use:

Labor Operation | Description | Labor Time
--- | --- | ---
J6374 | Sensor, Throttle Position -- Replace | Use Published Labor Operation Time