EFI to Carb switch
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Joined: Mar 2001
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EFI to Carb switch
I am trying to switch my 86 bronco with a 302 efi and aod, to carb. After asking people no one knows how to do it. I cant imagine it being that hard. What would you need to do it. New fuel pump, distributor, and wiring harness? I am also looking for a xmission shifter that bolts to the xmission to change the gears mine was broken on an engine and xmission rebuild.
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EFI to Carb switch
You are going to have to do something with the gas tank. Doesn't
it have the electric fuel pump in it? I know it's going to have to much pressure. You only need around 5lbs.
it have the electric fuel pump in it? I know it's going to have to much pressure. You only need around 5lbs.
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EFI to Carb switch
[font size="1" color="#FF0000"]LAST EDITED ON 13-Mar-01 AT 11:07 PM (EST)[/font][p]I did a 85 302 F250 EFI to carb conversion last summer. The new motor was a 300-6 that was already carbed so it was a little easier. Had to replace all fuel lines, remove high pressure pump and low pressure in-tank pumps. Rewiring the ignition, fuel pump relays, and rewiring the gas gauge (since the pump was removed), and a few other items required a better wiring diagram than Chiltons (got it from Alldata). A test light will be your best friend. In retrospect, it wasn't too difficult. Other folks here can speak to any other necessary changes to your existing engine.
I still have a complete 302 EFI with pumps that I can't seem to give away.
Skip
I still have a complete 302 EFI with pumps that I can't seem to give away.
Skip
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Joined: Jan 2000
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EFI to Carb switch
Why do you want to swap to a Carb setup? The EFI is truely superior.. I would leave it.
But it's easy enough to do.. Get a carb intake, carb, put it on.Your going to disregard ALOT of wiring. You might also want a better cam at the same time. To save time, and get better performance at the same time, I'd wire in an MSD setup, or you can use the ready-to run distributor from them. You only run 1 wire, and the ignition is good to go, with no sifting through miles of wire.
Find a way to get the fuel pressure down to 5-7psi, and your set.
But it's easy enough to do.. Get a carb intake, carb, put it on.Your going to disregard ALOT of wiring. You might also want a better cam at the same time. To save time, and get better performance at the same time, I'd wire in an MSD setup, or you can use the ready-to run distributor from them. You only run 1 wire, and the ignition is good to go, with no sifting through miles of wire.
Find a way to get the fuel pressure down to 5-7psi, and your set.
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Joined: Feb 2001
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EFI to Carb switch
I did this on a car a year ago. I am also going to do this on my Bronco as a quick fix until i can get the mass air flow because i'm making serious mods to the motor. How i overcame the fuel pressure problem was to join the out and return pipes together and using a T piece and made a line to the carb with a low pressure fuel regulator plumbed into it.It worked perfectly. good luck with your swap
