Engine Mechanical problem
1993 BMW 318 4 cyl Two Wheel Drive Manual 110000 miles
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i have done lots of engine repair work on car everything was fine and drove fine then some months down the line i was driving and lost all power and engine cut out.got towed home and cant figure out why it wont start.timing,fuel,spark,sensors,h20 pump,fuel pump,fuel filter,green sports air filter,co2 sensor,thermostat,radiator,h2o & engine temp sensor all new and working/fitted correctly.can you give me your advise.thanks

Do you have a check engine light On prior to this problem?

Something has to give here

If the engine's condition is in tip top shape-do below to determine if its fuel or spark problem that's if its cranking over and refuses to start

Get a carb cleaner and spray into the carb or the throttle body on an EFI. Did it start and die? If not disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel problem, check the fuel pressure to rule out the fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil,distributor pick-up coil, ignition control module, cam and crank sensors-

If both fuel and spark is present-check the valve and ignition timing, this will lead you to problems with compression and valves opening and closing at the wrong time