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Old 06-07-2005, 09:08 AM   #1 (permalink)
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wiring up a 350 tbi

If someone could enlighten me on how to search this I will gladly delete this post. I can't find what I'm looking for using 4 letters or more. I'm wanting to figure out how to wire up my 350 tbi and computer from an 89 Blazer into my YJ.

Thanks for any help on search thoughts and I'll delete this before it's moved.
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Old 06-07-2005, 10:18 AM   #2 (permalink)
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The best advise I can give you is to just keep searching here and JU has some good info too. When all is said and done, you are only splicing 6 or 7 wires. Keep the 7747 computer and all of the wiring harness under the hood and the wires coming from the computer, under the dash over to the main fuse block and ALDL.

below are a couple of threads that helped me doing this swap into a 5.

enjoy

http://www.pirate4x4.com/forum/showt...re+harness+tbi

http://www.pirate4x4.com/forum/showt...re+harness+tbi

http://www.pirate4x4.com/forum/showt...re+harness+tbi

http://www.pirate4x4.com/forum/showt...re+harness+tbi

http://www.pirate4x4.com/forum/showt...ight=chevy+tbi

http://www.pirate4x4.com/forum/showt...hreadid=226016
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Old 06-07-2005, 02:04 PM   #3 (permalink)
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Here is the list I put together
It wire by wire what you need to make it run.
Plus the link to the diagrams on diy-efi.org

HTH
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Old 06-07-2005, 02:04 PM   #4 (permalink)
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This is Cheesasaurus-Rex, but I'll pass it along.

Here's the Summit web page for the Painless TBI kit. Now if you look, you'll see a hyperlink for the installation instructions in PDF form. What I did is just print that and I am using it with my OE harness first. So, if i don't get it to work, I'll order the real deal $300 is worth my time at first pass

Good luck
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Old 06-07-2005, 04:20 PM   #5 (permalink)
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What Geesh said................................The painless kit is great I tried to do it by splicing and soldering. What a waste of time man. I woun dup moounting my ECM under the dash above the Glove box..........
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Old 06-07-2005, 04:46 PM   #6 (permalink)
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www.affordablefuelinjection.com

or something like that
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Old 06-07-2005, 04:57 PM   #7 (permalink)
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here i found emm
http://www.pirate4x4.com/forum/showthread.php?t=291426
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Old 06-07-2005, 10:52 PM   #8 (permalink)
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I'm getting my ECM modified and a harness from AFI for a 4.3 TBI conversion soon. Will post on their quality and service when done.
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Old 06-12-2005, 07:29 AM   #9 (permalink)
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Thank you for the help fellas, I appreciate it.
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Old 06-12-2005, 08:49 AM   #10 (permalink)
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Quote:
Originally Posted by Hijumper
I'm getting my ECM modified and a harness from AFI for a 4.3 TBI conversion soon. Will post on their quality and service when done.
I am using the AFI harness and chip on my buggy and it works perfect so far. Quality is top notch and so is the service, at least in my experience.
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Old 06-12-2005, 02:21 PM   #11 (permalink)
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Quote:
Originally Posted by Hijumper
I'm getting my ECM modified and a harness from AFI for a 4.3 TBI conversion soon. Will post on their quality and service when done.
I'm running AFI on my scrambler , top notch . Harness & instructions made for a very easy install
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Old 06-13-2005, 03:13 PM   #12 (permalink)
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Thats good to know, thanks for the info. This is my first engine swap - I'm sweating bullets. All of my AA junk arrived today, just waiting on AFI now
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Old 06-13-2005, 08:26 PM   #13 (permalink)
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im going to have to read this later when I want to do mine.
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Old 06-13-2005, 11:05 PM   #14 (permalink)
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I hate to be the bearer of bad news, but i have not had much luck with affordable fuel injection.

Dont get me wrong, Norm is a nice guy, but it took forever (3 months) to get my harness, i guess they were out of connectors, some of the connectors didnt plug in right, and the both chips he burned for me didnt work at all. Took me quite a while to figure out what was going on. The harness delayed my project for a long while. Ended up costing me a lot of money in the end that i thought was unnecessary. Im not happy with the product and will not refer anyone there.

My advice: Go to your local library and tell them you need a wiring schematic for the '89 blazer. They should be able to help you out.
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Old 06-14-2005, 12:16 PM   #15 (permalink)
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I swapped a 95 350 TBI into my 93 YJ. I knew nothing about them at the time, but have picked up things as I went along. I just used the factory 350 harness and put the Chevy fuse block under the hood and also kept the Jeep one as well. All I did was run one wire from the ignition (hot on run and start) to the 350 harness to power everything up. I also ran power from the chevy fuse block to a chevy fuel pump that I put in place of the Jeep one in the tank. Adapted the Jeep temp and oil pressure sending units into the motor so those gauges were still functional. That was it.

Last edited by HeyZeus; 06-14-2005 at 12:18 PM.
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