Possible Cause & Correction

Check following items:

• Ensure air filter and fuel filter are not plugged. Replace if necessary. Check for incorrect fuel pressure. Also check for contaminated fuel.
• Check shift solenoid system and TCC system for proper operation.
• Check knock sensor system for excessive retard.
• Check ignition control system for proper operation.
• Ensure EGR valve is not open all the time.
• Check exhaust system for restrictions, such as a damaged or collapsed pipe, muffler or catalytic converter.
• Check charging system output. Repair charging system if voltage is less than 9 volts or more than 17 volts.
• Check for A/C clutch cutout at wide open throttle.
• Check MAP sensor.
• Using Spark Tester (ST-125), check for available secondary voltage.
• Check air induction system for restrictions.
• Check engine valve timing and compression.
• Ensure the installed PROM is correct for that particular vehicle. Check with dealer for latest application information.
• Check PCM grounds for clean, tight connections.
• Check for incorrect or worn camshaft.
• Check for excessive fuel additives.
• Check for binding accelerator cable.
• Check distributor vent system (if equipped).
• Check engine supercharger (if equipped).
• Check if engine is operating in power management mode (if equipped).
• Check boost control system components and connections (if equipped).