Often, when you press the gas pedal, the engine refuses to spin up, the speed does not increase. Another subspecies of this malfunction is the inability to gain speed above a certain value. The reasons for this malfunction may vary.
Start troubleshooting the ignition system. Check spark plugs and spark plugs. If there are signs of overheating (light brown streaks along the insulator), replace them. If there is carbon build-up, be sure to clean or replace. Check the ignition coil - with such a breakdown inside the coil, an internal breakdown of the high-voltage winding is possible. Check high-voltage wires: one of them may be too high resistance or have an internal open circuit. Rarely, the reason for a failure in the set of revolutions can be the unsoldering of the collector mount of the high-voltage transistor of the switch. If the ignition system is in order, look for a defect in the power system. One of the most curious cases is a forgotten rag inside the gas tank, which, when a vacuum occurs in the tank, clogs the intake grid of the gas pump. Too frequent use of rinsing agents for injection motors has the same effect. Flaking dirt collects in rather large pieces and acts in the same way as a rag. Check the operation of the ballast block. It looks like a ribbed box located on the fender or under the windshield in the engine bay. If the engine refuses to rev and the exhaust turns black and the spark plug insulator is blackened, see the check valve. Either he is out of order, or wedges. Be sure to check the throughput of the catalytic converter after removing this cause (replacing the valve). If, when unscrewing the nozzle, you can see with the naked eye that the injector is pouring gas "like from a bucket", then the reason is a malfunction of the on-board computer. This is extremely rare and can only be eliminated by replacing this computer. Check the catalytic converter. A clogged catalyst is often the cause of a malfunction. To check it, unscrew one of the spark plugs, start the engine and sharply gas. If the engine suddenly picks up speed briskly, then the reason is in the catalyst.
