CAR TURNS OVER BUT WONT START

If the engine cranks over the battery and starter are most likely OK. Keep in mind an engine must crank over sufficiantly fast enough for the engine to suport combustion and run. The engine needs three things to start, fuel (gasoline), ignition (spark) and mechanical integrity (it must develop compression in each cylinder to start ie mechanical components must be in synchronization with each other. If it had run well previous to this no start condition chances are the engine is well mechanically. Had the Check Engine light been on? The engine may have lost spark or fuel which could be due to any one of a number of sensors having failed or the fuel pump or related components are not delivering fuel to the fuel injectors. The engine uses many sensors to report engine temperature, air flow into the engine, crankshaft and crank shaft position sensors to allow the computer in your car to make calculations controlling fuel and spark to the cylinders. It is hard to speculate without being able to hear the engine crank over and do some preliminary tests to determine the cause of your no start condition.

2014 dec. << for the past 2 years a few times now the engine turns and no ignition. 4 times these past 2 years i am told it's electrical and the "computer chip" needs replacing as e/thing runs perfectly on this car..a few munutes after the failed ignition the car starts perfectly. i thought it was bad gasoline, i replaced fuel pump n fuel filter, spark wires n sparkplugs last year. for months it starts like a charm the car is...then once again no ignition but the starter turns the engine, one mechanic told me it was the alarm safety preventing any spark going to the wires. just today after 2 months of excellent performance it once again turned with no startup. tommorow i bet it will start fine. i'm about to get another car. since the two years of this dilemma this has happened 9 times. could it be an old electrical distributor?