Hums but wont start

Disconnect the fuel line at the fuel injector and crank there should be fuel spray if none the pump needs replacement.

I suggest that you take the starter motor to an accredited auto electrician as it indicates a dry joint problem in the armature bars
the fix is
the bars can be re-soldered
or My preference -- a new armature

The hum is likley your fuel pump priming the fuel delivery system. I would start looking at the wiring coming from the Throttle Position Sensor. With the key in the ON position, you should be getting a 12vDC (or a little higher) signal to one wire and an excellent ground on another (usually the center if there are 3). If you are missing a good ground or the 12v signal, there lies your problem. Good luck.

http://toolsnyou.com/ go to the link get the service and repair manual and solve the problem

Check fuel filter?

sounds like fuel pump

0340 is camshaft position sensor and the other 0325 is the knock sensor. Chances are you need to replace the sensors and good to go.

Possibly a leaking head gasket. Water/antifreeze seeps into the cyllinder when it cools off, and then it won't fire properly until the coolant is blown out the exhaust when you start it. Let it warm up with the rad cap off. If you see bubbles continuously coming up to the filler hole, you have a head gasket problem. Do you have to add coolant monthly, or weekly?
If you're lucky, it could be just a spark plug that doesn't want to do anything until it warms up, or it could be a valve.

you have a bad fan swtich in the block or the therostat housing its an easy fix

try adding some HEET to it it is a gas line antifreeze product which also takes care of water in the gas other then that you may need a fuel pump which will require a towe