There is something wrong with my Hainan Mazda 323.

LZ means that the detector cannot be connected to the driving computer. This is definitely a problem, but it is not necessarily related to insufficient acceleration. According to LZ's description, the gearbox problem can be basically ruled out, which is basically the engine itself or the control problem.

First look at the air flow sensor and throttle position sensor. The signal of the sensory sensor is maintained at a small opening, resulting in the calculated fuel injection quantity being maintained at a small amount, which can meet the needs at medium and low speeds. High speed, large opening and large air intake, but the fuel injection is still maintained at a small amount, and the combustion is abnormal, so there will be a trend of car crash.

If the above problems are eliminated, it may be deeper. Some parts of the control computer may fail, such as ignition system, crankshaft position sensor, gear ring, etc., leading to a certain low-speed operation mode. This really needs to solve the problem of linking with the detector, and reading the fault code helps to judge. Good luck.