HO mani+TB

[XAlliedYouthX]

I'm looking into the purchase of these 2. I'm going to get a HO mani. drilled and matched by theraceshop.com and use a standard HO 56mm TB. What I am wondering is what do I need to do to get all the vacum lines and cables and such that were originally on the stock 2.4 TB to connect to the 2.3 TB? I read a few write ups about the mani and TB swap process and some say that a bunch of stuff has to be drilled into the HO TB and some say that the lines from the 2.3 can be used. I'm confused about it.

[urweak]

**** what you heard! lol

Now this picture is of a 1990 intake manifold and TB its off a GTZ

White dot: hose from fuel rail

Light Blue dot: MAP sensor hose

Pink dot: Plug up with something, pipe fitting

Dark Blue dot: White hose

Green dot: Hose that doesnt reach (get some vacum hose, pull the hose from where it is on the left side of the engine bay, put the new hose in its place, then put the hose you took off at the end of the new hose you just attacted and connect to green dot area.
Black dot: Brake booster hose that you cut

Use the 2.3 TPS (throttle position sensor)
Use the 2.3 IAC (can remember right now)
Use 2.4 MAP (manifold absolute pressure)
For the 90 TB you will need to use your 2.4 Throttle cable bracket (but i think it hangs up alittle, in this case you will need a pre 93 2.3L throttle cable bracket.

You also know that you have to remove you EGR and buy the GM block off plate and get a EGR gasket.

Also might want a 2.3 intake manifold gasket since it comes with a TB gasket too. Use that new TB gasket since god nows how much wear is on the old one, and youll have that 2.3 intake manifold gasket as a templet (there only like 6-10 bucks)

And i use gold/redish RTV silicone for the gasket, just squart it on and your good to do, no need to cut your own gasket out and all that crap.

Hmmm, if i think of anything, ill post it, or if you need more help ask.

[XAlliedYouthX]

I know what they look like. I'm looking for what work is needed to get the TB to setup right.

[urweak]

Originally posted by XAlliedYouthX
I know what they look like. I'm looking for what work is needed to get the TB to setup right.

lol i was working on it

[XAlliedYouthX]

Thanx

[urweak]

and whats up with the RIP on your car? Do you still have that red GA or did you get a new one? lol

[XAlliedYouthX]

Got a teal one, I totalled that one a few months back due to brake faliure.

[urweak]

well that really sucks, how did the brakes go?

[XAlliedYouthX]

One of those freak accidents. The pads were done a few weeks before and were fine then when it came to that day I crashed they didn't go, atleast not until I was about 2 feet away from the car infront of me.

[urweak]

so did my info help?

[XAlliedYouthX]

It makes sense reading it and the diagram helps. Just a matter of how things will go when I get down to actially doing it.

[urweak]

Originally posted by XAlliedYouthX
It makes sense reading it and the diagram helps. Just a matter of how things will go when I get down to actially doing it.

buy this flange (http://www.exploitedracing.com/Chevrolet.html) so you dont have to port match anything. All you will have to do is drill out the bolt holes. with the plate you need longer bolts though.

Then your going to need that gasket
then a breather filter
some vacum hose
rtv silicone
block off plate and gasket
EGR simulator (this is up to you, you probably wouldnt pass emissions though without the sim) http://www.zzperformance.com/zzp/products/engine/egr_sim_blockoff.htm

But everything is super easy, take all the parts off, do a little work on the manifold, put the block off plate over the EGR port, put the manifold on, then tb hook up lines, and bla bla bla and start your car up.

[XAlliedYouthX]

With that flange will it be just as good as it would be if I had it port matched? And the EGR prob would be because of the SES?

For the 90 TB you will need to use your 2.4 Throttle cable bracket (but i think it hangs up alittle, in this case you will need a pre 93 2.3L throttle cable bracket.

90 TB???

[urweak]

Originally posted by XAlliedYouthX
With that flange will it be just as good as it would be if I had it port matched? And the EGR prob would be because of the SES?



90 TB???

Well, you cant really port match the manifold 100% to match up, unless you have good equipment, you might be able to get it 80% matched up with a dremal.

The problem with the EGR is that the manifold isnt going to fit with it on, so you have to take it off. This will throw a low EGR flow code, p0404, p0405 if i remember right. To get rid of that you get the EGR simulator and you good to go (but i have heard it causes bogging)

90 TB= 1990 Throttle body, the throttle bodies before 93 are different then the ones from 93-95 ( i still dont know 100% on why they are different)

[XAlliedYouthX]

I actually jumped over to quad4forums.com and was doing some reading and it said to use the 2.4 IAC and TPS sensors? I was just curious cause I put the HO TB on my 2.4 manifold until I get a HO manifold and it killed my car. It wouldn't stay started. I'm pretty sure it was cause I forgot to connect the MAP sensor vacuum and drove a little like that but I just wanted to check about those 2 sensors to be sure.

[urweak]

im running the 2.3 IAC sensor, car runs fine. you just might have a bad one.

[XAlliedYouthX]

When I didn't have it connected it was running REALLY REALLY rich so I think it could've fried the O2 sensors and messed somethign up

[azeniskid]

um.. you need your MAP sensor connected.. or your car will not run happy at all.. and you can.. foul an o2 sensor along w/ a number of other things...

93-95 t/bs are the way to go... the earlier ho t/bs are big hunks of metal looking things... simply put, they have more accessory crapola loaded onto them, different style tps and iac sensors which are just monstrous large along w/ their housings...
*gags*

[XAlliedYouthX]

um.. you need your MAP sensor connected.. or your car will not run happy at all.. and you can.. foul an o2 sensor along w/ a number of other things...

So I found out. I went to to the store one day and when I came out to start up my car it wouldn't stay going. It would turn on but only roll over a few times but when I hit the gas it kept spinning. I was told that they just had to replace a sensor and reset the engine light. I'm plan on putting it back in when it warms back up and going to make sure i connect it this time.

[urweak]

Originally posted by azeniskid
93-95 t/bs are the way to go... the earlier ho t/bs are big hunks of metal looking things... simply put, they have more accessory crapola loaded onto them, different style tps and iac sensors which are just monstrous large along w/ their housings...
*gags*

:( I like my ugly 1990 TB

[XAlliedYouthX]

You think the manifold gasket from a j-body 2.4 would work on a modified 2.3 manifold?

[urweak]

Originally posted by XAlliedYouthX
You think the manifold gasket from a j-body 2.4 would work on a modified 2.3 manifold?

gasket? as in the rubber thing you have on your car? If thats the case no, just buy a tube of gold RTV silicone and sqwart it on the manifold and that will make you a nice flange when you bolt everything up.

[XAlliedYouthX]

Where is the EGR located at??

[azeniskid]

EGR is located on the head, and there's a line that goes to the bottom of the stock intake manifold.

[XAlliedYouthX]

Is it that little cylinder on the far right on the intake side? Has a metal tube and a plug on top?

[urweak]

the EGR hangs off the head right next to the power steering stuff. and there is a line that runs to it.

[XAlliedYouthX]

Can the HO manifold be bolted onto the head with the EGR still attached to the head aswell? Or does the EGR have to be removed so the manifold can even be attached to the head at all??

[urweak]

the EGR gets in the way.

[XAlliedYouthX]

The problem with the EGR is that the manifold isnt going to fit with it on, so you have to take it off. This will throw a low EGR flow code, p0404, p0405 if i remember right. To get rid of that you get the EGR simulator and you good to go (but i have heard it causes bogging)

Heard it causes bogging? From the EGR not being used I'd assume? How do you have yours setup cause I have read a few ways to get rid of the egr.

Also why is a breather filter needed?

[urweak]

ive heard the EGR sim causes bogging, if you remove the EGR and block the port off youll just get a check engine light, and the car will run fine.

The breather filter is for the hose that runs to the part of the intake, since you cant do that with the ho manifold you just slap a breather filter on it instead

[Jigga9JayZ]

i have the sim and i dont bog at all


but like i said before i have a 99 engine since my 98 blowded up
but the comp is still the same

[pahtpat80]

i picked up a portmatched one on ebay cheap fits perfect i also got a bored out 56mm 2.4 TB and redrilled the holes to match the ho mani couldnt be happier except that whole egr thing was a wicked pain in my A**

[urweak]

what did you do for the EGR?