Ok now, so .. i've been at the 'start up' stage for about 3 days now (actually only about 6 hours of work https://www.nopistons.com/forums/pub...IR ) and there has been a problem that im stuck on.



Well, ive tracked it down through the fuel pump and open relay to be a ground problem. Ive been looking and all my grounds i can see are grounded. Perhaps something isnt connected right? Anyways..



Here is the problem. Fuel pump wont turn on, injectors wont fire.

When we jump the fuel pump, fuel obviously flows :-p Goes right up to the injectors then right back to the fuel tank! Reason being, the injectors wont fire. None of them. So me and my friend went through everything looking for this ground that was missed. We were curious about these also, so i included a picture. Can anyone tell me what they belong to? Thanks for the help

does no one know?!

You must have a series 5, cuz on my 4, ive neever seen those plugs, or i havent seen them yet....lol...



No idea man...sorry

the one on the right is the aws or air supply plug. i cant see the one on the left.



the ecu should be firing the injectors if it sees an rpm signal

You know where the rpm sensor is? :( I feel like a n00b .. haha

front left of the motor, crank angle sensor, looks like the bottom of a distributor

oh, so the CAS sends the rpm signal?

yep

well thats working i know that, cause when we started it up off of carb cleaner, the rpm's showed on the tach, so thats gotta be working. You know where there is a diagram that shows the complete s5 harness? I mean, whatever ground is grounding the open relay (basically all the wiring going to the fuel pump) has a bad ground and i cant seem to find it anywhere. :(

have you tried manually grounding it?