Throttle Position Sensor: Adjustments

PURPOSE
To ensure correct results of procedures.

OPERATIONS
Prior to checking or adjusting engine operation the following procedures must be performed.

Inspect Fuel System
- Fuel clamps are tight and fuel is not leaking.
- Check fuel pipes and hoses for corrosion, damage, cracks, etc.
- Fuel filter is not clogged, fuel lines not restricted or hoses colapsed.
- Water is not present in fuel, filter or lines.
- Unleaded fuel is used in fuel system.

Inspect Air Intake System
- No leaks in the intake ducting.
- No vacuum leaks at intake manifold gasket.
- Exhaust Gas Recirculation (EGR) valve gasket is not leaking.
- All vacuum lines are connected properly, not leaking.
- Positive Crankcase Ventilation (PCV) hoses are connected and not leaking.
- Oil filler cap is installed and not leaking.
- Oil dipstick is installed and not leaking.

Inspect Electrical System
- All electrical connections are secure.
- All connections are correct.
- Engine Control Module (ECM) harnesses are routed properly and are at least 100 mm (4 in) from ignition cables.