Tune-Up, Initial Inspection

TUNE-UP, INITIAL INSPECTION

NOTE: Tune-ups are generally considered a maintenance procedure. An initial inspection is performed to verify the vehicle is operating properly and there are no existing problems. Detailed troubleshooting information is provided in:
Ignition System
Fuel Delivery and Air Induction
Emission Control Systems
Computers and Control Systems

Vacuum Indications:

- Check manifold vacuum readings. Record the vacuum level and idle speed. Manifold vacuum readings (taken at a vacuum port downstream of the throttle plate) should be steady and smooth.

NOTE: Taking "before and after" readings of engine vacuum will allow you to verify the tune-up was performed properly. Engine vacuum (at the same rpm) after the tune-up should be equal to or higher than the initial readings.

- Inspect all vacuum lines for:
- Proper routing. Diagrams
- Deterioration or chafing.
- Crimped or broken lines.
- Inspect PCV valve and replace if necessary. Positive Crankcase Ventilation
- Run the engine at idle and 2000 rpm while listening for:
- Arcing spark plug wires
- Vacuum Leaks.
- Pings or rattles.
- Other abnormal noises.
- Inspect all fuel lines and fittings for leakage.
- Check engine oil, coolant, and transmission fluid for proper level and condition, replace if necessary.
- Inspect all electrical connections for snug fit and check all wiring for broken or chaffed insulation.
- Inspect Drive Belts for wear and proper tension, replace or adjust as necessary.
- Inspect Radiator Hoses for wear and deterioration, replace as necessary.
- Turn all lights on and verify operation:
- Headlights
- Tail lights
- Turn signals
- Emergency flashers
- Parking Lights
- Turn air conditioning on and verify proper operation, service as necessary.

TUNE-UP, FINAL INSPECTION

- Verify ALL tools and used parts have been removed from the vehicle. Account for all parts which were replaced.
- Verify all electrical connectors are snugly attached.
- Verify all ignition cables are properly routed and firing order is correct.
- Verify all connections that were disconnected during the ignition timing check are reconnected.
- Verify there is no visible fuel leakage.