Workshop Manual

6A–10
ENGINE MECHANICAL (6VE1 3.5L)
Engine Lacks Power
Condition Possible cause Correction
Trouble in fuel system
Fuel Pressure Control Valve not
working normally
Replace
Fuel injector clogged Clean or replace
Fuel pipe clogged Clean
Fuel filter clogged or fouled Replace
Fuel pump drive circuit not working
normally
Correct or replace
Fuel tank not sufficiently breathing
due to clogged Evaporative
Emission Control System circuit
Clean or replace
Water in fuel system Clean
Inferior quality fuel in fuel system Use fuel of specified octane rating
Powertrain Control Module supplied
poor voltage
Correct circuit
Throttle Position Sensor cable
broken or poor connections
Correct or replace
Throttle Position Sensor defective Replace
Mass Airflow Sensor not working
normally
Replace
Manifold Absolute Pressure Sensor
not working normally
Replace
Intake Air Temperature Sensor not
working normally
Replace
Engine Coolant Temperature Sensor
circuit open or shorted
Correct or replace
Engine Coolant Temperature Sensor
defective
Replace
Powertrain Control Module defective Replace
Trouble in intake or exhaust system
Air Cleaner Filter clogged Replace filter element
Air duct kinked or flattened Correct or replace
TWC defective Repair
Ignition failure
———— Refer to Hard Start Troubleshooting
Guide
Heat range of spark plug inadequate Install spark plugs of adequate heat
range
Ignition coil defective Replace