Hello! I have a 2002 Mazda Protege’ which recently started losing power periodically. At the same time, the check engine light would blink and then stay solid. The dealer diagnosed a random engine misfire and replaced the spark plugs, wires, and coil packs. It cost $500.00. After 3000 miles, the problem has returned worse than before. This weekend it lost and regained power repeatedly in short spans of time, and lurched back and forth as it happened. The check engine light returned as well.
My first question: what do you think this is? My neighbor suspects a clogged fuel filter or fuel regulator.
My second question: what, if anything, does the dealer owe me financially?
Thank you for your consideration.