MY MAZDA 626 2000 MODEL HAS JUST RETURNED FROM THE MECHANIC FOLLOWING AN OIL RING CHANGE. NOW IT JERKS LIGHTLY WHILE IDLE BUT THE JERKING GETS WORSE WHEN GEAR IS ENGAGED IN DRIVE AND EVEN WORSE WHEN BRAKES ARE APPLIED (WHEN DECELERATING), SUCH THAT IT SWITCHES OFF AT TIMES

https://www.mazdaforum.com/forum/mazda-protege-23/car-jerking-33730/
https://www.ifixit.com/Answers/View/402105/while+driving+it+jerks+and+acts+like+it+being+rob+fuel

https://carfromjapan.com/article/car-maintenance/car-jerks-when-accelerating/

I had a 2000 gmc which jerked bad and I thought was transmission problem. I found it was bad map sensor. If you have check engine light find out what the codes indicate. These days electrical controls mechanical much of the time.

What year? What model? Jerking... when? Where do you feel the jerk? Do you have a "Check Engine" light on the dash?



You may have just lost a front axle. The rubber boot around the CV joint cracks, and dirt gets in and ruins the CV joint. This shows up as a sideways jerking in the steering wheel, rapidly getting worse and worse. It feels dangerous, and it IS dangerous. If it\'s allowed to continue, it could break the axle shaft - you certainly don\'t want that to happen on the highway.



If you\'re NOT talking about a sideways jerking in the steering wheel, please desribe what you DO feel, and when it happens, and if your "Check Engine" light comes on. It might possibly be nothing more serious than your air conditioner turning on & off.

first step is to have the fault codes read so that you have an idea of what is wrong
next is to have the transmission oil changed as dirty oil will cause that sort of fault
find an accredited service center with mazda experience or go to an accredited automatic shop for a service f the transmission
it will be servo/solenoids or oil problems

check the spark plug wires. one or more may be bad . if you want to check it yourself get a spray bottle with water in it and spray the wires if you see sparks they are bad

Sounds to me like you need to take a trip to your local certified mechanic!

What about fuel filter or fuel pump?
Sounds like it is not getting the fuel through or is getting to much fuel
Check choke not sticking and air filter clean etc.
Regards Craig

Get a botle of spark. Spray plugs and al your electrical conectors and try again. I think your problem will be solved. If the plugs getting dirty like burned inside . Im sure you need new rings.

youmay have picked up some dirty fuel .check fuel filter again

You Think your mechanic did not Connect your distributor cables.