After the computer was carried out on the car four-wheel testing, be sure to do a comprehensive analysis of the fault, in theory, four-wheel positioning for each parameter to adjust to the original specified value, however, because many cars without reserve adjustment part, often can only adjust camber and toe, even some can only be adjustable toe, but the bundle adjustment is very accurate, because the shaft head clearance factor, About tire wear, the pressure of the tire is not equal factors, poor steering system, etc., the influence of such factors as the car will cause adverse phenomenon, which is to do computer the most headaches, four-wheel positioning solution only by experience make comprehensive analysis on the phenomenon, eliminate factors or replacement parts. This is to generate new maintenance costs, sometimes owners may not be able to accept.

All wheel alignment parameters cooperate and coordinate with each other. Therefore, when a certain Angle cannot be adjusted or bad phenomena still occur after correct adjustment, another parameter related to it can be flexibly considered to jump to non-standard state to make up for the negative effects caused by the inability to adjust parameters.

Running deviation, for example, a car can be used if the front wheel camber adjustment is to run in the opposite direction of trends to offset the ill effects of shrinking Angle, another kind of phenomenon, not running deviation or minor running deviation, but in front of the front beam adjusted running deviation or wandering is aggravating, before they can be easily attributed this phenomenon to bundle adjustment, actually otherwise, Since the vehicle is always in the same position as the front harness of the left and right wheels when going straight, the front harness itself does not cause a deviation. But if the front bundle is not correct, the friction between the tire and the ground increases, but can cover up the deviation. In fact, there is already a tendency to run sideways in the vehicle for other reasons, but it is covered up. When the deviation tendency is covered up, it often shows that eating fetus is more serious. At this time, if the factors of deviation are not comprehensively analyzed and the front bundle is adjusted blindly, the original non-serious faults will be highlighted. In a word, the difficult problems must be carefully comprehensive analysis, from which to find an effective solution.