K
tbi 350 to carb??
jumbo
+1y
The wiring on my tbi is beyond fubar'ed, I'm calling Uncle and going carbed. At least for now, just to get it to run. So here's the skinny:
I have a 1989 GMC Suburban with the TBI 5.7L motor, with the 700R4 tranny (supposedly). My father in law has several carbed 350's at his house, he said i could use whatever i need off those. I know i'll need the intake (are there different intakes that fit the 89 block, or are they all pretty much the same?), a carb, HEI distributor, and fuel regulator to choke down the fuel pressure to carb. Anything else? I've done some research online and found some people that say i need a TV Cable or something? or a switch to lock the tranny? what up with dat?? I know it's not a 4L80-E because they only offered those starting in the 91 burb, so i know it's not electronic. Am i missing anything else? Please don't start with the "why go carb, you gotta keep that tbi" threads, as i said, the wiring for the tbi is beyond fucked (missing plugs, missing plug ends, relays on firewall with no idea what they're for, nothing labeled or color coded, etc, etc.), i just want the damn thing to run for more than 30 seconds so i can enjoy it for a little bit. I'll probably eventually rip out ALL the wiring and go with a new painless tbi harness and complete vehicle harness, or something, i just need it to run, like NOW! Any help will be much appreciated.
I have a 1989 GMC Suburban with the TBI 5.7L motor, with the 700R4 tranny (supposedly). My father in law has several carbed 350's at his house, he said i could use whatever i need off those. I know i'll need the intake (are there different intakes that fit the 89 block, or are they all pretty much the same?), a carb, HEI distributor, and fuel regulator to choke down the fuel pressure to carb. Anything else? I've done some research online and found some people that say i need a TV Cable or something? or a switch to lock the tranny? what up with dat?? I know it's not a 4L80-E because they only offered those starting in the 91 burb, so i know it's not electronic. Am i missing anything else? Please don't start with the "why go carb, you gotta keep that tbi" threads, as i said, the wiring for the tbi is beyond fucked (missing plugs, missing plug ends, relays on firewall with no idea what they're for, nothing labeled or color coded, etc, etc.), i just want the damn thing to run for more than 30 seconds so i can enjoy it for a little bit. I'll probably eventually rip out ALL the wiring and go with a new painless tbi harness and complete vehicle harness, or something, i just need it to run, like NOW! Any help will be much appreciated.
baggedbmy93mazda
+1y
i have a complete harness, ecu everything, its out of 87 k5 blazer...ill let it all go if you wanna stay tbi! and are interested.....
cookiemonster13
+1y
89 is the non vortec head so a standard 350 intake will work. you need an HEI dizzy, a carb (i would suggest a 600 edlebrock), a kickdown (TV) cable for the transmission if it is a 700r4, you will also need to jump one wire on the transmission to another terminal and get power to a third out of 4 terminals so the converter will lockup, and get your fuel pump regulator and you should be ready to ride.
http://www.hotrodders.com/forum/700r4-lockup-wiring-diagram-112798.html
there is a wiring diagram for the lockup solenoid.
http://www.hotrodders.com/forum/700r4-lockup-wiring-diagram-112798.html
there is a wiring diagram for the lockup solenoid.
baggedbmy93mazda
+1y
yeah i was looking for that.....i did this a few years ago...dad walked me through it... i was looking for info...^^^^^^yeah what he said....lol