A full and complete engine tune up at Expressway Mechanic on Duty includes new spark plug wires, a new distributor, new spark plugs, PCV valves, air cleaners etc, etc. A proper tune up starts with removing your spark plugs and doing a compression check in each cylinder. It is our goal when performing a tune up to make your car run like it was new. If that means cleaning the fuel injectors and checking the fuel lines for proper pressure then that’s we do. We finally check the completed engine tune up with proper diagnostics to see if the engine is operating at it’s most efficient capacity. We pride ourselves on full service (complete) tune ups.