Check to see if you have a MPV that has been included in the recall for the PCV line. Yes it is difficault to get to on your own, however they have special tools to reach behind the manifold to remove the line and install a new one. If you do it on your own it is very difficaul and will take a few hours as a I did before I found out about the recall. The service dept. should have asked you about the recall when you went to get the part from them. Where I got pissed was when they did replace the hose the faulty line had fouled the pcv valve and they did not bother to replace it and that is tucked under the intake manifold and under the fuel rails.
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Sounds like you are having random misfires of your plugs which could indicate a need for a tuneup (or if you've changed your plugs, you didn't use the OEM plugs). What's your mileage? Is your check engine light coming on?
Hello there, As far as the check engine light I would think since you mentioned it shacking that your light will probably be on for a misfire, Meaning most likely you have a spark plug wire going bad. I would stop by somewhere such as Autozone for a free check to tell you why your light is on just to double check.
Your fan issue could be several different things such as the fan motor going bad or the blades could be rubbing something, that one is a little tricky without hearing it.
Good Luck and I hope this does help you some. Allen
Hi there im in australia and i have come across a few mazdas not just the mPV that have this same problem. if it was the air flow meter you would be able to accelerate as the computer wouldnt pickup that more air is entering the engine therefore it wouldnt compensate with fuel! try disconnecting the battery with the negative terminal for 60 seconds. if that dosnt work try cleaning the throttle body and IAC and get someone with a decent scantool to reset the idle. Hope this Helps. Regards Ben
we had a very similar problem on our 2003 mazda mpv. at first we were also told coils. we changed all the coils out and the problem came back. we found out that it was a leak in the egr valve and gasket. there was also another leak found after that. when the leaks were fixed, the problem stopped. i suggest checking for leaks in your engine, this could be the problem.