Re: 94 4.0 Starts and dies (every time)
Did the crankshaft position sensor have a round mount hole or an oval hole (allowing in and out movement? There is a spec for the air gap on the sensor if it has an oval mount hole, there is actually a "green dot" that is basically a cardboard sticker that you stick to the end of the sensor that sets the proper gap on sensor installation. Also did you use an aftermarket ckp sensor or an OEM sensor? HIGHLY suggest the OEM. Not that this is for sure your problem but you would not be the first to have a bad brand new CKP sensor.
With you loosing the injector pulse after a couple seconds this sounds to me like an ASD relay being commanded off. ASD relay feeds the injectors and will be shut off for things like no crank signal at the pcm, it will come on for the initial startup but if it doesnt see a crank signal in so many seconds it shuts off. Honestly I am not sure if it will try to fire anything on just the camshaft position sensor.
2005 Jeep Grand Cherokee - Gone but not forgotten!