The 2013 Audi a4L's engine suddenly lost power and stopped while driving. The situation improve

Sudden stalling while driving is sometimes caused by oil or circuit problems, or a mechanical failure. If it is an oil or circuit fault, you can use the following methods to diagnose and eliminate it: ① honk the horn, turn on the headlights and check the electrical system ② pull the shock absorber to see s 'he has improved and check; if the oil passage is blocked. If the mechanical operation is abnormal and causes sudden shutdown, it is easy to cause accidents damaging the machine. Faced with this situation, a comprehensive analysis and careful inspection should be carried out, and an outward first then inward, first easy then difficult method should be adopted. General diagnostic steps: ① Firstly, get out of the car and check whether there are any abnormal phenomena in the engine: such as smoke, burning smell, obvious damage, etc., and check whether oilengine missing or damaged. ② Crank the car to see if the crankshaft can rotate and the burner in the distributor rotates, or remove the distributor assembly for inspection. ③ Remove the valve chamber cover and check whether a valve is loose and inserted into the cylinder. ④Open the small oil pan, check whether the clutch is well separated when the clutch pedal is depressed, whether any parts are damaged and loose, whether the flywheel fixing bolts are loose, use a crowbar to lift the flywheel counterclockwise to see if it can turn, and check and diagnose if the starter gear is stuck. ⑤ Check whether the water tank is short of water, remove the spark plug and observe whether there is water vapor at the electrode, then check and confirm whether the cylinder seal is ablated (once the cylinder seal has been removed, thewater jacket hole and the cylinder hole is connected and water enters). ⑥ If the above conditions are normal and the car still cannot be shaken, remove the oil pan and check whether there is any machine damage accident such as burnt axle due to holding tiles. Measures to avoid "sudden flameout" machine damage accidents: ① Check the quality of engine oil frequently, add or replace lubricating oil regularly, and select the specified brand of oil. ② Schedule maintenance and repairs, and do not delay or omit items; during technical maintenance or overhaul, clean all parts, clear oil passages and completely eliminate hidden dangers. ③ Adhere to civilized production, avoid barbaric disassembly and assembly, strictly enforce process specifications, implement repair standards, and cleanparts before assembly, so that unqualified parts are not installed on the vehicle and unqualified oil is not used. ④ If any problems are found during operation, solve them in time to avoid accidents damaging the machine.