For 1990-2009 cars

Definition: Engine delivers less than expected power.

Verify customer's vehicle has an actual problem by comparing it to a similar vehicle.

Check:

• | Air filter for restriction

• | Restricted fuel filter, contaminated fuel or improper fuel pressure

• | Exhaust system for restriction

• | Secondary voltage using a spark tester and jumper wires to check voltage output of the secondary coils

• | Generator charging output voltage. Repair if less than 13 volts or more than 16 volts with engine running and all accessories Off.

• | Verify engine has no mechanical knock or spark knock. If knock is present engine timing will be retarded and loss of power will result.

• | Engine valve timing, compression or worn camshaft. Refer to engine mechanical section.

• | Worn spark plugs