What causes a Mazda 3 to run rough at idle?

What causes a Mazda 3 to run rough at idle?

If a coil pack goes bad, it’ll cause a misfire and rough idle condition. Really, your 3 will be running rougher at any RPM, but a misfire will be most pronounced at idle.

What should the idle RPM be on a Mazda 323?

At idle, this should be at around 800RPM. If you push the gas pedal, the RPM should increase, but once you remove the pedal pressure, the RPM should move back to its original ‘idle’ position. If you started at 800RPM prior rev-ing up, expect it to still be at 800RPM when your foot is off the pedal.

Why does my Mazda 3 want to stall?

I’ve got the EXACT same problem. Put it in Neutral or Park, idles at 700 RPM. Put it in Drive and brake, idles at 300 and it feels like the car wants to stall. When the car is cold, it’s fine. When it warms up, it acts up.

Why is the idle not working on my Mazda 626?

If the idle smooths out, you have an EGR valve control problem. If not, try tapping the EGR valve and see if it shuts. You can reach under the EGR valve and manually push the diaphragm up and down to see if it makes a difference. You may have to remove the EGR valve completely to check it.

Why is my Mazda 323 not idling properly?

If you are, then the most likely cause will be a faulty ignition coil. If the engine is is not idling smoothly, but rather the revs are jumping around, then this would be the first place to check. The engine management warning light will most likely have appeared on the dashboard as well.

Why is my Mazda 6 running rough at idle?

Really, your 6 will be running rougher at any RPM, but a misfire will be most pronounced at idle. Spark Plug Wires – While not every model and engine combination of vehicles today comes with spark plug wires (a lot are now coil on plug), if your 6 happens to have them, they can go bad and cause a rough idle.

Why is my Mazda 323 making a growling noise?

If you look under the vehicle, oil will be clinging to the bottom of the sump. You will need to fit a replacement oil sump to rectify the situation. If you are hearing a real growling noise coming from the front of the car at the back of the engine, then the front exhaust down pipe is prone to failure on this car.

What does the management warning light on a Mazda 323 mean?

If the engine is is not idling smoothly, but rather the revs are jumping around, then this would be the first place to check. The engine management warning light will most likely have appeared on the dashboard as well.