The check engine light is flashing and the car shakes when idle. The shaking improves while driving.
If the check engine light is flashing you should probably get it scanned to see which coil(S) need replacing. When the light flashes it means that something is seriously wrong. STOP driving. If you continue to drive it will melt your catalytic converters. I have had customers that get the misfire issues repaired and come back maybe a month or two later with burnt converters. Converters are not cheap either.
SOURCE: 2003 Mazda Protege car is shaking When Drive and Engine light stay On
I bet it also feels like it wants to stall as well. I think my car was at around 65k and it did the same. It is the spark plugs and the coil. My mistake was going to the dealership where they charge you too much. Any experienced mechanic can do it. Changing the coil is also in the manual.
SOURCE: 2002 mazda tribute es
check to make sure #5 spark plug wire isn't bad,make sure you have not wired it wrong from changing plugs. You should purchase a chilton manual if you haven't already
SOURCE: Engine shakes when Idling/ Check Engine Light started blinking
i just fixed a similar problem on my van there is a rubber elbow on the end of the pvc hose that connects to the valve cover you can only buy the elbow with the hose and it costs about 100 bucks but i guess they have had to replace a lot of these because the new one looks twice has strong you just have to check and see if its collapsed in on itself preventing air movement or leaking the shop will charge you 175 dollars to fix it plus the part but it only takes 20 minutes good luck
SOURCE: 2002 Mazda Tribute, Check Engine light came on and
Stop in at autozone or similar parts store & get free code scan, then see which way to go from there. Cheaper & faster than guessing.
SOURCE: 2005 Mazda 3 idles rough at stop light and sometimes dies
The problem is a faulty solenoid in the vapor recovery system. The solenoid is sticking open and allowing fumes from expansion of fuel in the fuel tank to enter the air intake and smother the engine. This is how the Mazda service tech explained it to me. It is a known problem on the Mazda 3 in various trims which Mazda refuses to acknowledge. Usually the check engine light comes on and the engine diag code reads mass airflow sensor, which is incorrect. I dealt with this for 6 months on my wife's 2005 Mazda 3i before the dealership figured it out. My cousin bought a 2007 Mazda Speed 3 which developed the same problem after a few months and was cured by the same fix.
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