Lack of Power, Sluggish

Definition: Engine delivers less than expected power. Little or no increase in speed, when accelerator pedal is pushed down part way.
POSSIBLE CAUSE ACTION
Contaminated fuel Check for water or excessive alcohol in fuel, refer to ALCOHOL IN FUEL TEST, drain fuel tank and add clean fuel

Lead contamination of catalytic converter Check for missing fill pipe restrictor
Replace catalytic converter

Low fuel pressure Check fuel pressure, Testing and Inspection

Pinched or collapsed fuel hose/line Repair/replace as required

Throttle valve not fully opening Check accelerator pedal travel, (floor mat/carpet interference) check throttle cable adjustment

Throttle body deposits Check throttle body minimum air flow rate,
Clean throttle body, Throttle Body Cleaning

Dirty air filter Clean or replace filter