Without knowing the make and year it's impossible to speculate. Could be a low battery not spinning it over fast enough, a bad ECM, a broken distributor, a failed ignition coil or any number of other things -.
My guess would be a defective ignition switch.
More information is needed. Does the engine turn over, but not start? Have you checked for gas and spark?
With the distributor cap off have some one turn the engine over. If the rotor doesn't turn you broke the cam or a timing gear.
The cps other wise know as crank position sensor shows the ecm that the engine is turning over and then the ecm turns on the spark and the fuel to allow the car to start. If the cps is bad the ecm won't see the engine turning over so in turn it won't allow fuel our spark.
Since the starter is good but will not turn the engine over when hot, check the engine for free rotation. Turn the engine over by moving the crank by hand (with the ignition off.) The engine could be sticking when hot and not be able to turn over.
no the cams shouldn't turn if the chain is brokrn. It may be streched and or the tentioner may be worn out.
In most cases, the engine will not fire or start if the clutch switch is bad. The key will turn in the ignition but there will be no turn-over or sound from the engine. If the engine turns over but doesn't start, there might be a problem with the fuel supply.
There are several things that can cause an engine to turn over but not start. The most common cause is a lack of fuel.
C4 Got a new Starter but engine doesn't turn or engage?
If your engine turns over but doesn't start it is either not getting fuel , spark , or air
Does the engine turn over but not start or it does not turn over till cold? If the latter is the answer then your kick start is the problem. REPLY The car turns over but wont start.
Out of gas? 99 vw passat will not start but turns over have full gas tank try to turn over
The most common reason for an engine to turn over but not start is a lack of fuel. The fuel tank might be empty or the fuel pump might not be working.
turn the key the motor turns over but will not start
2002 chev S-10 will turn over but not start.
When you say it will not start are you saying it will turn over but not fire or are you saying it will not even turn over. That bit of information is critical to an answer.If the engine turns over, check the fuel cutoff switch.
More information is needed. Does the engine turn over, but not start? Have you checked for gas and spark?
For the engine to start and run, Something has to make it turn / rotate and that is were the fly-wheel comes into play. When you turn the key to the start mode it sends power to the starter and a little gear comes out of the back of the starter and fits into the ring gear on the fly-wheel and that turns the engine over so it will start.