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Q: Car won't start after a repair. on 2001 Dodge Caravan

We were driving down the freeway and the car just lost power like it ran out of gas. We had filled the tank up the day before. We figured the fuel pump and fuel filter had gone out as they were original to the car. We towed the car home and changed the fuel filter and fuel pump, but it still won't start. The battery was replaced this past april, there is sparks coming from the spark plugs, and there is gas going to the engine. How can we fix my car?
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It's so difficult to guess without being able to experience the problem first hand and at least do some basic diagnostic test. If the engine cranks over the battery and starter are most likely OK. 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. Check for fuel pressure. Remove the fuel hose that goes to the fuel rail and get a friend to crank over the engine to see you have adequate fuel pressure and volume (you should "Tee in" an actual fuel pressure gauge to verify the fuel pressure meets the specification for your vehicle). Listen to the fuel injector, use a long screw driver place the handle end up to your ear and the metal tip end up to the body of the fuel injector, get a friend to crank over the engine while you "listen" to the fuel injector listen to each injector at the same point of the injector body. You should hear click, click, click as the injector is opened and closed by the computer, if the injector is not being triggered you will not have fuel getting into the engines cylinders.
If you have spark and fuel then my guess would be the timing belt has jumped, causing the spark and fuel not to be in the right place at the right time.
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