Hyundai Repair: Fuel pump, fuel pressure gauge, crankshaft sensor

Question
How can I tell if I need to buy a fuel pump, my Hyundai Sanota will turn over but it will not completely crank up; everything starts up   urn over but it's not catching, what do think the problem is? And what is the price of one?

Answer
To check whether your fuel pump is working, you'll need to install a fuel pressure gauge and check the fuel pressure when cranking.  If you have no fuel pressure, you'll then need to check for power and ground at the fuel pump connector.  Then, if you have no or low fuel pressure, and proper power and ground, it's a good conclusion that the fuel pump has failed.

Problems that could cause cranking but not starting are numerous.  First, you need to try to determine what sort of problem you have.  You'll of course want to know if you have fuel pressure, but there are some easier things to check first.  

Check whether the check engine lamp comes on when you turn the key to the "on" position.  If not, that's an indicator you have an issue with your engine control module (ECM) powering up and operating properly.

Check whether you have spark.  This can be done by pulling one of the wires off a spark plug and installing an old (or new) spark plug in the end of the wire.  Lay the plug on the metal valve cover, crank the engine, and observe whether it sparks.  If not, you're probably looking at a crankshaft sensor or other issue which makes it impossible for the ECM to determine proper spark timing.

Remove the upper timing cover and check the timing belt.  Check the camshafts to be sure they're properly positioned in relation to the crankshaft.

As for the cost of a fuel pump, that'll depend on where you purchase the pump, the manufacturer of the pump, and where you have the work done, as well as your geographic location.  

If you're unable to do the diagnostics I've described above yourself, you should get help from someone who can, even a professional if necessary.  Trying to determine the problem from the symptoms is only guesswork at this time, and you'll probably end up spending more money doing that than paying someone to find out what the problem is.