is it a vg30e or vg30de...? vg30de.. ohm check the injector should be around 12-14ohms (typical problem is bad injector). if its over 19ohms, it will cause problems... also, check compression, #6 is usually the cylinder that goes first. vg30e, again check injector and compression. otherwise, could be the ecu or the harness not quite plugged in all the way (make sure is completely seated and flat in the ecu). good luck.