Any ideas why my mazda mx-3(also known as mazda eunos 30x) would be idling roughly?

  • Thread starter Thread starter littlebirdie121
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littlebirdie121

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i have just bought a mx-3 1996 model that has developed a rather rough and low idle,so low that it has been stalling when stationary.
I have taken it to a mazda dealer and there are no computer issues and a diagnostics machine didnt find anything.They had the car for a week and are still unsure.
They have said that it could be the fuel filter,air filter or distributer but would need to buy each part to be able to test these parts.
I was wondering if anyone has experienced a similar problem or has heard word of any problems that the eunos is known for relating to this issue.
Any feed back or ideas would be great.
Thanks
 
Rough idle can be associated with:

1. Fuel system
a. Have the fuel injectors blown out - should be done about every 40,000 miles
b. Replace fuel filter
c. Make sure you're gas isn't contaminated with water.

2. Air system
a. Clean/replace the air filter - make sure the intake isn't clogged with crap.
b. Make sure EGR valve/Pollution system is working.

3. Electrical system
a. Clean/replace sparkplugs
b. Replace sparkplug wires (start the engine in a closed dark garage, lights out, look for arcs - coronas- on the sparkplug wires)
c. Ignition timing is off - requires distributor adjustment and/or replacement of the timing belt.
d. Coil/alternator is going weak - insufficient spark
 
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