Here is the other reason a straight intake won't work on a pre-99 car

[John_D.]

Ok, I decided not to try to hook up a cable to replace the electric throttle. I was planning to make an adapter plate to put my old tb on the new intake.

But....

On the 98, there is an idle air control valve above the butterfly. This is slightly opened and closed by the pcm, to maintain the correct idle. It also happens to be in the intake.

So if you put the straight intake on, no more iac unit.

Apparently the electric throttle unit also serves a dual purpose as the iac, and slightly opens and closes the butterfly to manage the idle speed.

I figured this little gem out, when I was looking at the new intake, to figure out where the iac air passage was, in order to plan out the adapter... There's just not one.

An external iac control would have to be plumbed from the tb to the intake. Too much fabricating for me...

At least my curiousity is finally satisfied on the feasibility of this mod. It's been on my mind for a long time.

[dstrbd1]

i'll be taking a shot at it as soon as my intake gets to my door. maybe we can talk sometime ans share some ideas. i'm not afraid of a little fabricating to make this work.

[John_D.]

Sounds good to me. [img]smile.gif[/img]

So far the iac provision seems like the hardest part. Check that out on your intake. It's above the tb, and has a wiring connector on the passenger side.

The new one would have to be plumbed into the back of the old tb, in that hole above the butterfly, and then brought back into the intake (anywhere).

I'm thinking, that the old intake could be cut up, so that the housing for the iac valve is all that remains. Then tap some hose ends on each end of it, and have the now stand-alone iac unit tied to the tb and the intake, via hoses.

[dstrbd1]

sounds like a plan, i should have most of the supplies needed available to me through work. once i actually get the thing in my hands i will look and make the comparisons and see what needs to be done.