Fuel Pump wiring issues with 3100 into Fiero.

[Maetrix66]

I finished the neccessary wiring to fire up my 3100 yesterday, and went to turn the key on to prime the fuel pump. Nothing. Checked the Relay, which will click over if pushed with a finger, so it is getting at least the constant power. I remembered hooking up all of the pins on the two main connectors on the fiero correctly to the 3.1 harness, so I started looking around, and probed the fuel pump wiring. No power to Fuel pump. So I looked and found the one connector that I neglected to hookup. The Fuel Pump power wire!! I thought it was strange that the fuel pump wires didn't have a disconnect somehere! So I connected a 12v source to a wire, and touched it to the connector. 53 psi of Fuel pressure, sweet. Now my problem is this, and maybe this is a engine swap question for people running a MPFI 3.1 computer "727" or "730" ECM. Which wire runs from the ECM to the Fuel Pump?? I mean the one that comes from the Relay box and connects to the Fuel Pump, giving it the timed prime function?? I could just hook it up ghetto with a toggle switch, but I'm going to do this the right way. Thanks to anyone that can offer any help.

[bszopi]

See if this helps...

[Maetrix66]

whoops!

I should have elaborated a little more. I have a 3100 engine, but the wiring harness is from a 92 w body. I clipped off the bulkhead connector and spliced those leads into the fiero conectors at that point.

[Mechanic]

There is some pretty good info for using the 7727/7730 on this
type of swap located here :

http://www.gmpcm.com/phpBB2/viewtopic.php?t=81

The 7730 relay drive is on A11 and splices to the Fiero's dark
green/white [A1]

12v for fuel pump circuit supplied at C17, from Fiero's
Orange/Black [440] (Always hot)

Fuel pump voltage monitored on E13. and splices to the Fiero's
tan/white [120]. Here is a link to the 7730 diagram :

6E2-A-5

And a link to an Adobe format file of the Fiero V6 Fuel Inj
diagram :

fiero08.pdf

[Maetrix66]

Thanks Mick, I'm going to straighten this whole mess out on Sunday.