My car starts up then runs for ten mins then dies. it will start up after that but wont stay running. then i come back an hour later then she starts right up and drives for ten mins then back to the same thing. whats wrong?

Check fuel pressure at the injector rail. Could be your fuel pump relay is cutting out. If fuel pressure is good, check for sparks at the plug wires. Read the link below for more info.
Do It Yourself Diagnosis and Repair

Check fuel pressure

hello ther I belive it is your ecu very common

starting problem ,takes 4-5 times turning over engine then blue smoke comes out of exhaust ,is very reliable when got started though -
ive replaced battery/glowplugs-&-relay/
a recovery man says no power to glowplugs ?
can you advise ?

A mechanic would check the ASD relay and the coil for voltage when the engine will not start.
You might also want to check the computer for trouble codes.

Do a fuel pressure test. If you have compression, and good spark, this is where you should start.

The EGR valve will not opon when the engine warms up so that is why it dies out

this year model is notorious for fuel related probs...check the remainder of the fuel system, injectors, and the fuel pressure regulator also verify that the fuel pump is actually running and getting the correct amount of power to the pump itself..... it may not be bad just not getting enough power

replace the distributor oil is leaking into the electronics of the distributor and shorting out pull cap back off and look and see if oil is leaking out

if you can get the car started again and with someone helping you have them take the positive side of the battery cable off while it is running and if it dies then it is the alternator also check your drive belt and when was the last time it was changed because it could be slipping