1994 Mazda MX-6 Logo
Michael Bruner
Michael Bruner Posted on Dec 29, 2008
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Eratic idle Did complete tune but not timing belt. it has 114,000 miles. high idle runs good. After it warms up it idles rough. It is worse when you run the air conditioning. The distributor gets pretty warm to the touch and you can feel the rotor turning, almost like a humming, or flutter. Is this normal? I can adjust the timing to 16 degrees and it idles perfect. It recommends to be between 10-13 degrees. I also made sure the ecm was disconnected to do this. I want to get it fixed but not sure if its distributor or timing belt or something else. Is there a mechanic out there that can point me in the right direction so I do not throw good money after bad? Your help would be much appreciated. Thanks

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It would be a good idea to see if you have a check condition(fault code stored) the MX will run badly particularly at warm idle if the cylinder position sensor has died. Fault code#3 I think, if so you will need to replace the Hall sensor module in the distributor base

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Adjust it to 16 degrees then, this should compensate the wear on your timing belt, but also then I recommend to replace your timing belt soon.

  • Peter Smithy Mar 19, 2013

    I strongly recomend that you replace your timing belt. Advancing it to 16 drgrees tells me it is well worn. If the belt brakes you will have to replace bent valves. You see, the cam will stop turning very suddenly but the motor wont. The cam will be holding some valves down and the pistons will hit them. Quite an expensive repair then.

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