No. 6 Low Maximum Speed And Poor Acceleration: Notes

WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

LOW MAXIMUM SPEED AND POOR ACCELERATION - DESCRIPTION & POSSIBLE CAUSE

6	Low maximum speed and poor acceleration
DESCRIPTION	Vehicle acceleration is poor at start Delayed acceleration when accelerator is depressed while driving
POSSIBLE CAUSE	If the clutch is stuck or gear is fixed in 3GR or 4GR, the malfunction is in the engine circuit. Clutch slippage, burning Line pressure is low Throttle position sensor malfunction Output speed sensor malfunction Input/turbine speed sensor malfunction Sensor ground malfunction Shift solenoid A and/or B malfunction Body ground malfunction Control valve body malfunction Transmission is fixed in 3GR or 4GR (Operation of fail-safe function) Short or open circuit in wiring Poor connection of connector Malfunction of the electronic parts in output and input system Insufficient starting torque (Suspected when gear condition, shift control and engine circuit are normal) Torque converter (Poor operation, sticking) malfunction Engagement in TCC operation range (Operation of fail-safe function) NOTE: Before following the troubleshooting steps, make sure that the on-board diagnosis and basic inspection have been conducted.

Low maximum speed and poor acceleration

DESCRIPTION

Vehicle acceleration is poor at start
Delayed acceleration when accelerator is depressed while driving

POSSIBLE CAUSE

If the clutch is stuck or gear is fixed in 3GR or 4GR, the malfunction is in the engine circuit.
1. Clutch slippage, burning
  - Line pressure is low
  - Throttle position sensor malfunction
  - Output speed sensor malfunction
  - Input/turbine speed sensor malfunction
  - Sensor ground malfunction
  - Shift solenoid A and/or B malfunction
  - Body ground malfunction
  - Control valve body malfunction
2. Transmission is fixed in 3GR or 4GR (Operation of fail-safe function)
  - Short or open circuit in wiring
  - Poor connection of connector
  - Malfunction of the electronic parts in output and input system
3. Insufficient starting torque (Suspected when gear condition, shift control and engine circuit are normal)
  - Torque converter (Poor operation, sticking) malfunction
4. Engagement in TCC operation range (Operation of fail-safe function)
  NOTE:
  - Before following the troubleshooting steps, make sure that the on-board diagnosis and basic inspection have been conducted.