Question about 2007 Mazda MX3
Also, the black rubber air chute between the front and the air filter may have a crack. This is a roughly rectangular airway that has about 3-4 different lines going into it. Its fairly large, near the right front area of the engine compartment (standing at the front bumper looking back towards rear) We had a crack on the underside and it was causing the air mix to be way off. It would shudder at low revs and you had to feather the clutch and keep the rpm high until you got rolling, in 1st and 2nd gears. Sorry for the non-tech description. Ours was cracked and someone taped it, so it was nigh impossible to find until the pulled the part out.
Posted on Apr 29, 2009
People reading these comments must, must understand that we are making our diagnosis based solely upon the information presented by the asker, so having said that, I base my email diagnosis on this premise.
Juddering is not such an uncommon description of a mechanical problem. Juddering can and often does refer to improper seating between the clutch dics and the fly wheel. Since the asker in this case has stated that "when its in first gear", indicates that the vehicle is equipped with a standard transmission. Automatic transmission due not normally exhibit these types of symptoms.
The juddering, which occurs in the area of the pressure plate, clutch disc and flywheel, are the result of overheating of the flywheel its self, which causes warpage in the surface of the flywheel.
This is why we would always recommend machining of the flywheel during a standard "clutch job."
Why did the vehicle require as much as 3000 rpm's to overcome the problem? The greater rpm is required to over come the warpage and perhaps a collapse of the pressure plate itself.
In 35 years of auto-repair, I have actually seen clutch systems explode, caused from the above-mentioned condition.
I give you cause for reflection, Bill
Posted on Nov 22, 2008
Locate your air your airfilter housing there may be a vent in the side or top clean this with a tooth brush as it gets cloged with dirt and oil.had same problem but with earlier model.
Posted on Nov 22, 2008
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