Car wont start but cranks

How can i check that?

Disconnect a spark plug wire insert a screwdriver into the boot and then hold the metal part of the screwdriver 1/2 in. From a metal part of the engine, have someone crank the engine while you watch for spark. Next check for fuel, locate the test fitting on the fuel rail unscrew the plastic cap and depress the schraeder valve and have someone turn the switch on, fuel should spray out. I hope this helps you

I have a 2007 Volkswagen Jetta Wolfsburg edition. So it will crank but won’t start. Checked all my fuse and the were good. Changed my ecm and my spark plugs but still won’t start

Check your fuel filter! It has a built in pressure regulator. Make sure you get the correct "Bar" rating which is stamped into the end of filter!