Before anyone says anything, I have searched, but need clarity. I have an 88 Iroc with tbi(I know, its weird), and i was thinking of converting but I am a little fuzzy on the fuel pump situation. It is my understanding that the tbi uses something like a 12lb pump.
-If I wanted to use that pump with a regulator, what would I need assuming that the car is no longer computer controlled what-so-ever?
-How is the fuel pump turned on and does it pump at the constant 12ish or so lbs?
-Could I just hook a regulator to it, put the fuel to the carb, and turn the key with it firing up, or would I need a swith to turn the pump on?
Its not a performance bound car, so I would like to use the stock in-tank pump. The whole tbi setup is shot from the unit, to the ecm, so carb is all im considering and I want to see if its worth fixing. Thanks in advance.
-If I wanted to use that pump with a regulator, what would I need assuming that the car is no longer computer controlled what-so-ever?
-How is the fuel pump turned on and does it pump at the constant 12ish or so lbs?
-Could I just hook a regulator to it, put the fuel to the carb, and turn the key with it firing up, or would I need a swith to turn the pump on?
Its not a performance bound car, so I would like to use the stock in-tank pump. The whole tbi setup is shot from the unit, to the ecm, so carb is all im considering and I want to see if its worth fixing. Thanks in advance.
Supreme Member
If you are keeping it stock and it doesn't make any power then you can get away with the stock lines and in tank pump.
Use a Mallory 4309 return style regulator. You will also need a non CC vacuum advance distributor. I suggest using an MSD distributor with a 6A box. It's the easiest to setup and wire. Pick a carb and intake of your choice.
The pump supplies a constant 12v. to the pump through a relay on the firewall that is activated by the ignition. You'll want to re-wire it since it runs off of wiring that's inside the factory engine harness.
Remove the factory engine harness, TBI, ECM. Plumb the lines and regulator, intstall the intake/carb/dist. Run wires from the factory senders for the gauges to under the dash on the pass. side and get a pinout of the plug to see where they go. This will let you keep your factory gauges.
Use a Mallory 4309 return style regulator. You will also need a non CC vacuum advance distributor. I suggest using an MSD distributor with a 6A box. It's the easiest to setup and wire. Pick a carb and intake of your choice.
The pump supplies a constant 12v. to the pump through a relay on the firewall that is activated by the ignition. You'll want to re-wire it since it runs off of wiring that's inside the factory engine harness.
Remove the factory engine harness, TBI, ECM. Plumb the lines and regulator, intstall the intake/carb/dist. Run wires from the factory senders for the gauges to under the dash on the pass. side and get a pinout of the plug to see where they go. This will let you keep your factory gauges.
Quote:
Originally posted by Dialed_In
The pump supplies a constant 12v. to the pump through a relay on the firewall that is activated by the ignition. You'll want to re-wire it since it runs off of wiring that's inside the factory engine harness.
This is mainly what I need info on because I want to make sure that the setup will be reliable as a daily car. I would like to know which relay it is because my relays are mismatched between stock and a 91 rs which is what the drivetrain came out of, due to the car being a big pile with nothing functional when I got it. Also, would it be advisable to use the stock relay, and what should I wire it to, a switch?Originally posted by Dialed_In
The pump supplies a constant 12v. to the pump through a relay on the firewall that is activated by the ignition. You'll want to re-wire it since it runs off of wiring that's inside the factory engine harness.
Supreme Member
You will be removing the factory harness and thus, the factory relay with it.
Either way you do it, you'll need a relay. You can wire in a toggle switch to operate the relay, or you can run it to a keyed +12v and the ignition will now take the place of the circuit. I would hook it to the ignition, it's the same amount of work either way.
Either way you do it, you'll need a relay. You can wire in a toggle switch to operate the relay, or you can run it to a keyed +12v and the ignition will now take the place of the circuit. I would hook it to the ignition, it's the same amount of work either way.