NEED HELP!!! SR Won't Start...

[240sxConvert]

Alright...so heres the deal. I am having two problems with my SR20 Swap. I am swapping into my brother's 89 240sx. I have swapped one in my 92 Vert with no problems but his is being a pain in the ***. The first problem is it won't turn over with the key. When you turn the key the relays in the engine bay click. I have switched the relays with mine and it still doesn't turn over. Right now I am bypassing this by giving direct 12v to the selenoid wire. The other problem is that I am not getting fuel. The fuel gets up to the fuel rail but I do not believe that the injectors are pulsing. I used an injector tester and they do pulse with that. Which means that they are not getting a signal from the ECU. The ECU is good because we are using the one from my car and my car runs just fine. This led me to believe it was the CAS. So we have two now and it still won't start. It starts by spraying starting fluid into the throttle body though...I out of ideas and could greatly use some help. At least somebody tell me how to check the CAS or the injector clip for pulse. Any help would be greatly appreciated...

[SpeedRacer1]

Alternator and starter wires wired backwards, fuel lines reversed?

[240sxConvert]

The fuel lines are good. What do you mean by the wiring "backwards"?

[SpeedRacer1]

Accidently screwing the wrong wires on the power wires on the starter and alternator.

[240sxConvert]

Wiring is fine...I am going to check the engine wiring harness and check all the grounds...I've run out of ideas...

[exode]

I'd almost guarentee its one of your grounds. Make sure everything is tight and your grounds are to the motor, not to the chassis. I always connect the negative cable to the long bolt going into the upper rad hose bung below the intake manifold. Thats a good place and it fits perfectly.

[240sxConvert]

I am thinking it is a ground too because that might be causing both problems but I am pretty sure that the motor is grounded to the engine and it is grounded to the chassis...but I will look at it...