I am new to modular engines. I know a tune up on my fox cost me about $100 for plugs, good wires, etc. I called the local ford dealer and they want $295 for a tune up on my 04 Mach. That seems REALLY high to me. They said the service included: change plugs and wires set timing check computer I'm at 45,000 miles and get an occasional jump / hesitation on acceleration.