So I am fairly unknown in this forum in regards to posts but I have been watching and reading way to much in here and figured I could get some reasurrance on a prospective summer/spring project. I have been reading about VI for a while since I never really liked the idea of the MEVI and losing the fun low end.

so here is a basic list I put together in order for me to still retain EGR and IACV in order to meet the emission standards here in Illinois.

Parts needed
00 VI Fed Spec intake manifold
00 Lower intake manifold
00 Throttle Body
4th gen IACV (already have)
00 EGR down tube
summit switch or something similar to activate VI
materials to make block plate for IACV (aluminum, barb fitting,tubing to manifold).
Misc. junk that always comes up in projects like this

Now I have read and understood that you can put in the lower 00 manifold with the injectors with some basic resoldering. Also I found that some people came across an easier method of almost remote mounting (might have misunderstood) the IACV by mounting a plate on it with a barb and then running this to vacuum on the intake manifold. Also I found that post saying you could get the EGR downtube from a 00 and put this in to make it fairly emissions legal. So with all this stated here come the noob questions.

1. Am I right about how this IACV method works and is their an open vacuum source for the IACV to read from and does this work well. My car is a daily driver here in wonderful illinois which means long cold starts which kind of requires the IACV from what I understand. Does this method work well becuase I really like the idea of doing this and not having a large adaptor plate.

2. Is their a way to order the 00+ EGR downtube from a dealer or junkyard or is it part of a whole assembly that I have to buy just for the one part.

3. When you guys are buying the upper and lower manifolds are you getting them from junkyards (have found them on car-part/com but I am unsure if they are just the bare manifolds ie no vias or injectors) or are you just buying the whole engine for simplicities sake?

4. Am I generally on the right track for what I should need and do.

Thanks in advance and I hope none of this was blatantly answered in other threads but I feel like I have read this whole forum as best as I can.

 

You need to decide if you are gonna use hte 00TB(built in IACV) or 4th genTB/Pathy TB and 4th gen IACV. It has to be one or the other.

Buy hte entire engine so you have hte upper IM bolts and EGR guide tube. Try to find an engine with hte injector connectors.

 

well ok then I have to use the 4th gen tb with an adaptor in order to use the EGR correct.

Basically I just have to call around and find out who has the engine and if they have the harness etc. Thanks a lot for the quick response.

 

I say you use the Pathy TB since it is 70mm, and 4th gen IACV. You can still keep EGR that way and have good air flow.

 

Will the 4th gen ecu control the 00 IACV? You will have to change the harness connectors at the least if you go this route, since they are different. I think it would be easier to just use the 4th gen IACV.

 

I'm running the 5th gen IACV on my 4th gen ecu. Works pretty well. I don't have A/C but it knows to idle up when the P/S switch comes on. Thing that sucks about using the 5th gen one is there's no idle adjustment screw. Your at it's mercy as to where it wants to idle. Mine generally idles around 700-800 rpms which is just right for me.

I think the easiest route that allow you to keep the EGR is use the '00 TB, fab a plate to cover the '00 IACV hole, and then use the adapter for the 4th gen IACV. This way you get a little bigger TB and don't have to fab an adapter so your TB will bolt on.

 

how did you elctronically connect the 5th gen iacv? i cant seem to find a pf tb so i might jsut have to do this route, and since i already have one ...., the 4th gen iacv has like 4 or 5 plugs on it while my 5th gen tb iacv only has 1. bswithtf can you take soem pics for me of your setup?

 

bswtihtf thanks a lot that definately sounds like a great idea. now just to make enough cash for school and then for this and a TS ecu hopefully. Its just so tempting to do this.

 

Ya I'll try to get some pics for you.

I just cut the 4th gen plug off and wired the 5th gen one on in its place. The middle two wires matched in color so I connected those two first and just connected the other ones accordingly, even though they didn't match. I'm not sure why or how it works. It was just a shot in the dark when I installed it, with the throttle cable idle control being my back-up plan.

Making an adapter to use the 4th gen IACV is probably the best plan, but this does work. The rpms drop pretty low sometimes (300-400) at stop signs and about once a week I'll start the car and it races at about 1500 rpms constantly. When it does this I just shut it off and restart it and it idles normal. Basically what I'm saying is this set-up works but it does have it's little quirks. They're not enough to bother me though and make me want to do anything differently.

 

You could always not have EGR.