TBI conversion End of the carburetor blues

[racerx12003r1]

Ok guys, I know there are plenty of you who have done a TBI conversions, so I have some questions. The throttle body, distributor, and ECM are a gimme. I know that I have to have certain sensors. (knock, AIT, MAP, MAT, coolant temp, and so on) My top concern is a fuel pump. I am guessing an inline pump is in order, but I have no idea of what type. Also, an O2 sensor. Is it going to work with no converter? I know that when I worked at the dealership in the late 80's, we gutted a couple converters and always got an oxygen sensor code after because of the lack of heat. I also remember that during that time, we found a PROM chip that was used on cars shipped to overseas to delete the oxygen sensor because they were still running leaded gas. We found it because a friend of a friend was putting a tuned port engine in a boat. Water manifolds + oxygen sensor= bad news.

Any help would be greatly appreciated. I'm tired of having the carburetor blues.

[lobie]

Daniel, I'm not very familiar with the older gm efi system but I know there is a lot of info on Binder Planet. http://www.binderplanet.com/forums/foru ... y.php?f=75

Maybe Blake will chime in. I believe he is familiar with this.

[racerx12003r1]

Thank you sir. I'll go check it out. I thought Jaber had done some EFI mods too. I am currently on the search for another LS/Vortec for a decent price. You know me, bigger is better. I'm comtemplating maybe a dual throttle body setup and getting that 427 ready to go.

[243]

I am working on a TBI install on my 360 now, my second attempt, the first on a 258 was successful; I used Binder Planet as a guide and Bill provided a lot of help with "user error" issues.

On the 258 I used an inline pump, similar to the pump Bill suggested but the part I used included clamps and other hardware, it was loud as crap bolted to the frame so I took the clamps off and trashed them.

I am using a 97 Blazer tank on my Cherokee with the factory fuel pump module, it's pretty quiet to me and solves the problem of not having baffles or a sump in the factory tank.

The O2 sensor is located upstream of the cat-con so it does not matter if you have one or not.

[jaber]

I use the standard Airtex E2000 pump mounted to the frame with a standard clear paper filter in front of it(suck side). They come with a foam sock that goes around the pump before you mount it to help with noise.

[243]

Gotta xfer case problem?

[Tatsadasayago]

It will buff out!

[sgtpoliteness]

If you go to my thread under the fuel injection tech (Jason's TBI install), I got a bunch of answers for the piddly stuff I ran into.

Also, you don't need to run knock or MAT/IAT. I don't and the truck runs really well now. I would've eventually liked to have installed IAT though.

[jaber]

Gotta xfer case problem?

Thats what happens to an NP229 when the front axle and rear axle have different gear sets and the wheels find traction...

[racerx12003r1]

Thank you guys. I really appreciate all the input. I was figuring this should be pretty much a straight forward set up. I have already swapped in a small block 350. I plan to make a trip to pull a parts tomorrow to try and find my stuff.

[racerx12003r1]

Well, I guess Im moving into the 21st century now. I have scrapped my TBI adventure. With the help of Jim and Zack Willett and a friend Tony Mundy from work, we made a huge score from the local Pull A Parts. I just happened onto a 2000 GMC Yucon that had just been set on the stands with a 5.3 and 4L60 trans. Needless to say yesterday I was the envy of several hotrodders that walked by. Several hours, a few bruised and bloodied body parts, and the occasional choice word, I have a complete 5.3 with everything but the fuel pump and Zack and Jim have a nice transmission. Well, I guess its time for transplant #2.

[lobie]

Well, I guess Im moving into the 21st century now. I have scrapped my TBI adventure. With the help of Jim and Zack Willett and a friend Tony Mundy from work, we made a huge score from the local Pull A Parts. I just happened onto a 2000 GMC Yucon that had just been set on the stands with a 5.3 and 4L60 trans. Needless to say yesterday I was the envy of several hotrodders that walked by. Several hours, a few bruised and bloodied body parts, and the occasional choice word, I have a complete 5.3 with everything but the fuel pump and Zack and Jim have a nice transmission. Well, I guess its time for transplant #2.

Great. Your in good hands with Jim and Zack. You'll enjoy the "bump the key starts". Lol

[racerx12003r1]

I think so too. this may take me a little bit to figure out the wiring on this monster. Several trips to pull a parts for things I forgot. I forgot to get the ALDL plug under the dash.

[243]

Good for you Daniel!

What trans/xfer case will you use?

I look forward to the LSx in my Cherokee too, but for now the TBI is worth the effort in spades. I am busy with projects inside but I just walked out and opened the door, turned the key and she fires up and purrs. I can't see how anyone would run a carb when even a 25 year old FI technology is so affordable and offers so much.

[racerx12003r1]

Im going to stick with my T176 for now. Should be able to pull the small block out and just set the LS in its place. Just got to find a flywheel for it. Was told the flywheel for a 4.8 or 6.0 will work. My nephew got a better deal than I did. He got a complete 5.7 aluminum block engine with everything for free.

[243]

I liked the T177 in my CJ, what bellhousing?

Initially I bolted a SBC to the T177 in my CJ-7 but as I recall, I was going to need the 153 tooth flywheel from a TBI F-body to work with the CJ starter.

[racerx12003r1]

its a modified Lakewood I picked up for 75 bucks on Craigslist. there are some pictures of it on a thread I started called Project Low Buck Chevy Swap. As it goes, Im still under $1000 on the swap and Im going to sell the 350 that I pull out. Im looking at it like this. I paid 200 for the small block and 250 for the ls plus 110 for the harness, ECM, alternator, and starter.

[sgtpoliteness]

Man, very cool!