Few weeks ago I had a solid check engine light. Around that time I was putting cheap gas(87). One day my car started missing while driving 50-80 mph. Then my engine started knocking on low speeds and check engine light started flashing. Since then changed spark plugs twice, wire set, dist cap, air filter and pcv. The mechanic cleared some codes except one unknown (according to him). He also said that he changed valve settings as well.
The light went away but the problem came back again after 1 week. The light was flashing, it went away for 2 days, and then came back again. The dealer is saying first put original plug and wire set then they can diagnose properly. I wonder if I had to change O2 sensor or fuel filter as well.
I am gonna try a different mazda dealer can you please advise how to approach this problem and explain it to the dealer. I want to spent money carefully
Tuesday, January 3rd, 2006 AT 11:10 PM