The cause of engine jitter

The cause of engine jitter:

Now many of our friends have a private car, then there will be a lot of problems when driving, the condition of the vehicle not only affects our driving experience, sometimes also affects our car life and our own safety.

Engine will continue to wear in the process of operation, the clearance between the piston and cylinder wall also will be more and more big, the wear degree is not necessarily the same, but each cylinder in cold start state, engine oil lubrication effect is poorer, the clearance between the piston and cylinder may omit part of high temperature gas, at the same time cause the cylinder working condition is not stable, has lower power output, The cost of testing and maintenance is also relatively high.