I am swapping an LT1 from a roadmaster into my 1989 Firebird. The Firebird originally had the 2.8 V6 T5. I am at the point where I need to wire my fuel pump and I have some questions:

1. Will the stock V6 fuel pump work as it is? Or will I need to upgrade to another pump? If so, I have the Roadmaster pump (see pics) will that work in my tank?

2. How do you wire the fuel pump? According to my pinout, there are two wires going to my fuel pump relay from the C100 and the other two went to my old ECM. I have new relays on my LT1 harness and I was wondering how to mate these together. Red is power (I assume) so would I just run this wire to my new relay as my power wire? I should also add that yellow is power on my new relay.

I hope these aren't stupid questions that I'm asking on this board but so far everyone here has been super helpful to me and I appreciate it a lot.

The top of the Roadmaster fuel pump.


Yellow is power.

My old fuel pump relay. This was mounted on the drivers side firewall. The orange and black wires both went to a common in the old ECM harness which I removed.

My pinout sheet.

Thanks for the help.

 

Your new relays probably have terminals labelled 85, 86, 30, 87, and maybe 87a.

85 & 85 are the relay coil. Grn/wht & blk/wht go to those, unless the swap harness covers that. 30 is the Common contact, 87 the Normally Open, and 87a Normally Closed. Org to 30, tan to 87.

You'll probably have to do some wiring at the pump end as well, if the connectors don't match.