Gtr Starting Issue

[Omurru]

Haven't had alot of time lately and the car hasn't been started in about 3 months, it's just been sitting in the garage with the terminals off the battery. It's always started first bang but went to start it the other day and it cranks and fires like it normally would but when you let go of the key it doesn't continue to run, if you continue to hold the starter on it continues to fire-crank-fire-crank etc. but doesn't run once you let go of the key.

The pumps are running, I've put fresh fuel in, I've swapped the CAS over to another one I have and still did the same. Everything switch/readout wise seems to be ok on the powerfc, I presume I have spark/fuel otherwise I wouldn't be getting the fire??

Any ideas?

[Omurru]

Just got enthusiastic and went and had another play, took the coilpack plugs off, cranked it for about 5 seconds and pulled a plug out and it was bone dry and the top of the piston looked dry as well. There's fuel pressure at the rail, what sort of voltage should I be seeing at the injector when cranking? and what would cause them to stop working?

[LTHLRB]

have you had a look at your fuel filter? its a long shot but it may be blocked. also did you have your foot on the accelerator when cranking to give it a little more juice on crank? how do the spark plug tips look?

[Omurru]

Fuel filter is ok as there is fuel coming out of the return. Had another play today and there's no voltage at the injector plugs when cranking didn't get a chance to go further but will check the voltage at the ecu, the service manual says check at the ecu against 'ground' and then check again against 'common ground' taking a guess it might be a grounding problem with the injectors.....joy....

[Ben C34]

The injectors should have 12v on them with the ignition on. The ecu grounds the injectors to fire them.

[Omurru]

Yeh, checked that and checked the continuity of the wires and ground and all seemed to be fine. Pulled all the plugs off the injectors and put 12v straight to them from the battery to make sure they were all clicking. Put the plugs back on and cranked it again for the hell of it and it started first bang....explain that shit.....