Other Concerns: Poor Vehicle Performance

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

OTHER CONCERNS - POOR VEHICLE PERFORMANCE

Possible Component	Reference/Action
253 - ELECTRICAL ROUTINE
Powertrain Control System
Electrical inputs/outputs, vehicle wiring harnesses, shift solenoids, digital TR sensor, torque converter clutch (TCC) solenoid, transmission fluid temperature (TFT) sensor	Carry out self-test. Refer to the INTRODUCTION - GASOLINE article for diagnosis and testing of the Powertrain Control System. GO to PINPOINT TEST A , GO to PINPOINT TEST B or GO to PINPOINT TEST C . Repair as required. Clear codes, road test and repeat self-test. Also refer to TORQUE CONVERTER CLUTCH OPERATION CONCERNS: ALWAYS APPLIED/STALLS VEHICLE .
Engine driveability concerns	Inspect air intake/air filter system. Check the fuel system and fuel pressure. Refer to the INTRODUCTION - GASOLINE article. Inspect the exhaust system for restriction. Refer to EXHAUST SYSTEM .
353 - HYDRAULIC/MECHANICAL ROUTINE
Shift Linkage, Digital TR Sensor
Damaged or incorrectly adjusted	Inspect and repair as required. Verify transmission shift cable adjustment; refer to AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS . Adjust transmission shift cable as necessary. After repairing transmission shift cable, verify that the digital TR sensor is correctly adjusted. Adjust the digital TR sensor as necessary.
Verify Correct Shift Scheduling and Engagements
See Reference/Action	Go to the appropriate diagnostic routines.
Torque Converter Clutch Always Applied
See Reference/Action	Go to Hydraulic/Mechanical Routine 241/341.
Torque Converter Clutch
Damaged	Inspect torque converter. Install a new converter as outlined.