07sick22

Alright so ive gone carbed on my 99 z28 i have the 6ls box and mallory regulator all the wiring not needed for the old fuel injection has been removed im still using the stock in tank pump with a 1/2in return line off the regulator question is when i turn the key on the pump primes but after i belive it stays off. Fuel pressure goes from 6 1/2 down to zero when the cars running in a matter of 20secs is there a way to tap the fuel pump relay into the ignition relay to keep the pump on when running or what would be the best way to do so?

ZONES89RS

iTrader: (25)

I have done that many times, if you pull the rear carpet up that is behind the rear seats, you will see the wires that go to the fuel pump and sender. It should also have a relay under the hood that has a wire that can be jumped to a constant 12 bolt key ignition position or use a switch if you like. Or a combination of the two.

I just wish I could tell you which relay and wires to use, I just do not remember the color.

07sick22

Yea thats what im unsure of ill search for a wiring diagram. Do you off hand kno what sensor keeps the pump running in 4th gens?

ZONES89RS

iTrader: (25)

The computer does that. When you eliminate EFI, you have to make it work. I've done it several times on trucks. 3rd gens and a couple LT1 4th gens.

Prorac1

iTrader: (4)

The fuel pump relay should be labeled in the relay center if it's located there. Eric L

07sick22

thanks for the responses guys we got it figured out and got the car running yesterday one more question I have I had a autometer 5in tach in the car before and it worked fine now I have it wired to the 6ls box and its way off driving about 45mph said I was at 5k rpms wich shoulda been more like 3k rpms and when I got on it for a sec it shot to 10k rpms lol do I need to cut or reattach one of the wires on the back of the tach since im running threw the 6ls box instead of the stock ecu? ill throw a few pictures of the car on here when I get a chance to

07sick22

07sick22

ZONES89RS

iTrader: (25)

Needto switch the tack to 8 cylinder mode. Usually people put it in 4 cylinder mode and wore it to the stock LS setup with Efi.

07sick22

Yea thats what im thinkin ill try and get out in the garage today and check it