AE - Lack of Power/Poor Acceleration

Description
This describes the operations necessary to diagnose a Lack of Power/Poor Acceleration symptom. This will involve checking the Fuel, Ignition, ECM, and other systems.
Refer to "Symptom Matrix Chart" for details.

Diagnostic Repair Procedure
Check the following:
1. Battery and Alternator
2. Main power supply and ground circuits
3. Fuel quality
4. Base Idle speed, ignition timing and throttle position sensor adjustment: BASIC INSPECTION AND ADJUSTMENT
5. Fuel Pump and Fuel Pressure Regulator operation: Gauge should read 34 psi at idle and 43 psi when fuel pressure regulator vacuum hose is disconnected and plugged.
For inoperative Fuel Pump refer to FUEL PUMP CONTROL
6. Ignition signal: P1320 - IGNITION SIGNAL
7. IACV-AAC Valve operation: Use CONSULT-II, ENGINE -ACTIVE TEST -IACV-AAC/V OPENING
8. EGR: Confirm it is not stuck or sticking open or operating when conditions call for no EGR. P0400 EGR SYSTEM
9. Fuel Injectors: INJECTOR NON-DETECTABLE

Use CONSULT-II to check the operation of the following items:
10. P0100 - MASS AIR FLOW SENSOR
11. P0131 - FRONT HEATED OXYGEN SENSOR
12. P0125 - ENGINE COOLANT TEMPERATURE SENSOR
13. P0120 THROTTLE POSITION SENSOR
14. P0500 - VEHICLE SPEED SENSOR
15. P1706 - PARK/NEUTRAL POSITION SWITCH

Other items to be checked as possible malfunction cause
16. PCV system
17. EVAP system
18. IACV-FICD
19. A/C circuit
20. Oil level and condition
21. Intake air leaks
22. Air Filter
23. Engine mechanical components
24. ABS/TCS Control Unit
25. ECM