Your missing spark or fuel.
engine have spark and fuel pressure and still will not start
Engine rotates but will not start
Could be fuel pump, or the coil and module, I've changed both in the past year on my 03 cav, real expensive, real pain. good luck
Check for: fuel, spark, compression
When the timing chain is bad on a 2002 Cavalier, the engine could have several symptoms. The engine could run rough, be hard to start, or not run at all.
takes 3 times for engine to start
Timing not set up properly
This may be a problem with the immobilizer, the engine isn't disonnecting the immobilizer from the engine, i.e. stopping the engine from being started.
it doesnt start when its foggy out because all the wetness in the air
check for clogged fuel filter, or faulty fuel pump
express 3500 chevy van tries to start but doesnt. when cranking stopped the engine rumbles. getting fuel can smell it.
Let it set for about 2 hours or push the accelerator pedal to the floor and hold it there while turning the engine over. Rarely do fuel injected engines flood. If they do then something is wrong with the firing system.