Long story short I was just driving and the motor cuts out. I have a soild ce, can't pull any codesl. Here's the background: It's a 2000 CX and I put a JDM B16 sir II into it about 3500 miles ago. About 3 days ago the bolt that goes through the rear tranny mount vibrated out. (how the hell did that happen?!?1..I don't know) Well last night I got about 8 blocks and the rpms went to zero and they haven't moved since...

 

If you have a solid CEL and you can't pull any codes that usually means the wiring to the ECU is messed up, or the ECU itself is messed up.

EDIT:
Is it even trying to crank? Fuel?

 

ya it tries to crank. And the fuel pump primes when I turn the key on.

 

check your timing belt...same thing just happened to me and when i pulled the valve cover off...guess wat the timing belt broke...and dont try to crank the motor anymore, you might bend some valves...

 

I'm pretty sure it's not the timing belt. I've done about 6 of them before and they have all been fine. Plus it cranks at a normal speed and you can feel the compressions. I'm thinking that I might have a bad ecu/connection like sydacate says. I'm going to go out there and put a P28 in that I have lying around and see if I can eliminate the possibility of a bad ecu.