Do you mean JERK?
change the map sensor
cause yours is broken
could be failing transmission
What causes a car to jerk while driving can be based on many factors. A car can sputter due to engine compression issues, bad transmission, engine misfire, bad spark plugs or even low fuel.
Sounds like cam position sensor , when it starts going out it affects the timing causing the car to jerk and run badly
Sounds like a broken or loose suspension component on your driving wheels. This could be deadly. Better take it in to a professional -------- now.
This could be the cause if an improper alignment if it happens under normal straight line driving. If the jerk is more prevalent when going on bumpy roads, it may be a sign of bad shocks or springs. If the jerk is occurring during braking situations, the problem may be related to the bearings being worn or warped discs/drums in the braking system.
You can use a car noise database to compare noises at mycarmakesnoise.com
The AC compressor puts quite a load on the engine, especially one with less cylinders. It puts a load on the engine, causing it to jerk back and forth.
e makes two plates jerk into new positions
a small evap leak would not cause your car to jerk.