Lack Of Power, Sluggish Or Spongy

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• Check restricted air filter
• Check ignition system.
• Check for faulty PCM and grounds.
• Check ignition timing.
• Check knock sensor system for excessive retard.
• Check for faulty Torque Converter Clutch.
• Check for contaminated fuel.
• Check fuel pressure.
• Check for restricted fuel filter.
• Check EGR system.
• Check for restricted air filter.
• Check for faulty throttle position sensor.
• Check for faulty MAP sensor.
• Check oxygen sensor for silicone contamination from fuel or improper RTV sealant.
• Ensure the installed PROM and/or PCM is correct for that particular vehicle. Check with dealer for latest application information.
• Check for faulty ECT sensor (engine coolant temperature).
• Use scan tester to ensure vehicle speed sensor reading matches actual vehicle speed.
• Check A/C system operation.
• Check charging system voltage.
• Check power steering operation.
• Check for faulty automatic transmission operation.
• Check valve timing.
• Check for excessive fuel additives.
• Check for improper or worn camshaft.
• Check engine compression.
• Check for restricted exhaust system.
• Check if engine is operating in power management mode (if equipped).
• Check for faulty or restricted throttle body.
• Check for sticking or slaking throttle cable.