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Home >> Acura >> 2010 >> TSX L4-2.4L >> Repair and Diagnosis >> Powertrain Management >> Transmission Control Systems >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Poor Accel Starting Off D, S, R; Stall Speed Low D, S, 1st, 2nd; Engine Doesn't Rev High RPM, Trans Upshifts Low RPM

Poor Accel Starting Off D, S, R; Stall Speed Low D, S, 1st, 2nd; Engine Doesn't Rev High RPM, Trans Upshifts Low RPM




Poor acceleration when starting off in D, S, and R; stall speed low in D and S in 1st and 2nd; the engine does not rev to high rpm, and the transmission only upshifts at low rpm (engine at normal operating temperature)

Diagnostic Procedure:

1. Engine output low

2. Shift solenoid valve E defective

3. Torque converter one-way clutch defective

4. Torque converter clutch piston defective

5. Lock-up shift valve defective

Also check for:

- Check for a stored DTC, and check for loose connectors.
- Inspect shift solenoid valve E for seizure, and the O-rings for wear and damage.
- Check the fuel pressure. Testing and Inspection
- Check for exhaust restriction.
- Check for intake restriction.
- Check the VTEC rocker arms.
- Replace the torque converter.
- Check the lock-up shift valve in the regulator valve body for free movement, and check the lock-up shift valve spring for wear and damage.