2017-10-10
Hard acceleration
Reduced fuel economy
Faulty Vehicle Speed Sensor
Vehicle speed sensor harness or connectors is open or shorted
Vehicle speed sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)
Brake Switch Circuit: Brake switch is responsible for engaging and disengaging the brakes on the tires when brakes are applied. Problems lead to inefficient braking
Monitor the engine idle to see if it stays within specifications in and out of gear and on road test
Check the engine for vacuum leaks
Check the engine for carbon build up on throttle plates and IAC valve inlet