Just cranking no RPM

[aguiarjason]

So I have a turbo 87 325i running 60lb injectors and a megasquirt. I had got it running and idling and then the next day it would only crank. Some reason it will crank but the ecu shows no RPMS. this happens with the megasquirt and the stock ecu, I tried both. I replaced the obvious CPS still nothing. No fuel, no spark. Im gonna replace the relays next but not sure if they would cause the no RPMS showing.

[Sea Aych]

Given that you've changed a bunch of stuff, check that you didn't fry any electronics - check your fuses (for the fuel pump, etc.) and relays!

Are you getting power to the coil when you're cranking? You could also check for power at the DME (pin 18, which is continuous, no-switch power).

Check your fusible link in the back too, since I think it acts as the in-line fuse to the DME.

Also, random thought (i can't remember if it allows you to crank or not), but did you activate the fuel pump shutoff thing with the "code" function on your 13-button OBC? That would disable the ability for the car to start.