You can get a real decent one for 30.00, Amazon.com: Equus 3145 Ford Digital Code Reader: Automotive and you can pull the codes without one if you want to. Ford Fuel Injection » How To Run a Self-Test...An ignition check up won't cost you anything, just some time looking at the spark plugs, and maybe testing the wires. Its just best to eliminate that possibility first thing, before spending a lot of money.