Sorry if it might be TLDR
Both Mani and TB are used, but verified that they are ported etc by Curt brown.
I have a CB intake manifold that had a ported throttle body, I installed the manifold first and everything was fine, I wanted to rebuild the 65mm TB for peace of mind and I wanted to put in a 65mm gasket as well. TB was installed on a later date.

At first, when I assembled the TB, the throttle plate, wasnt entirely 'centered' and was 'catching' on the edges, it would take a little bit of 'oompf' to get it to open and fully close, I didnt think anything of it at the time and had it installed. When i went for drive, i literally almost had to kick my pedal for it to move, after that, my throttle would get stuck partially open due to the plate, I logged on my Torque app, and i would be at 8% throttle, even at idle after going for a drive >.>

Pulled it all apart again, and got it lined up much better, probably as good as its gonna get tbh (those clearances are tight!)

So since I took both sensors off my old TB and put onto my new TB, I had to 'eyeball' the tps positioning, I dont have Evo Scan (yet), to verify if its 100% right, so I am going off of my Torque App by monitoring Throttle position

So my issues/scenarios are kinda as follows:
Car starts and idles at 1k~, which was normal in the past cause I got cams, and that's just what it was set to (throttle on my torque app reads .4%, point 4), but with the car off, and ignition on, the throttle reads zero and 100% (when I press the pedal down all the way), seems odd that it would just goto zero though...
After tapping the gas even once, idle goes to 1.8-2k and sits there, and my throttle reads anywhere between .8-2% at idle/cruise (no foot on the gas)
Also adjusted my throttle cable to be more on the tighter side (could be part of the issue, will loosen tonight to check)
Boost leak checked the car, and no leaks anywhere up to 25psi, gauge stops at 25 so I didnt go any further (tuned for 24)

My guess on the idle is that i need to adjust the screw (previous owner could have had it higher for whatever reasons), but that doesnt explain why it idles high after i press on the gas though >.>. Did my IACV randomly decide to take a**** at the most opportune time? It's somewhat of a new one like 20k miles maybe (oem brand)
Could my throttle being 'stuck' partially open be because of the plate still? Or possibly my throttle cable being on the tighter side of things?

Im trying to get a tactrix 1.3 cable locally to run Evo scan, so I might be just shooting in the dark right now >.>

Thanks ahead

Edit: Im also speed density, if that matters
Nothing changed on the car since tuned besides manifold (car ran fine/same)
Issues arised with ported tb
Car does not die or have any odd drive issues, car drives 1000% fine, just idles high in neutral/idle

 

Sounds like the BISS may need adjusted. You also may need the tune adjusted for the larger TB. You should also readjust the throttle cable so there is an ever so slight amount of take up/slack.

If you get the tactirx cable, "zero" throttle its typically 11-13% in evoscan. I'm not sure which calc the torque app uses.

 

I think torque app uses physical throttle position

Did I need a tune to be adjusted for the manifold though? I figured vice versa lol

Will adjust cable and BISS tonight for sure, tightening the BISS lowers idle right?

It was a very easy swap and I feel dumb that I even have any issues, and I feel dumber that the plate initially wasnt even lined up perfect which caused me to have to kick my throttle >.>

 

In is lower yes. You can also pull the main ECU fuse block to reset the learned trims for the ISCV control.

 

K I just loosened by cable
And sprayed wd40 on the spring just in case

I'm. 100% positive my butterfly valve is not 100% centered

That and combined with the fact I don't have that dry lube sealant that comes on the oem throttle bodies...

I once again tapped the throttle
It would says .8 % which is hardly anything but it was enough to raise to 2k rpms
I would goto my throttle body and 'force' the throttle body closed with my hand on the spring contraption (whatever it's called) and my rpms would go back down to normal 1k~
Hell even when my throttle says zero on torque
My rpms are still higher than normal

This weekend I'm gonna have at it again ..

 

WD40 collects dust. Maybe use graphite powder? If the butterfly isn't centered, that could explain having to close it by hand. If so ,it may be evident when you look inside. Also sounds like your TPS may need adjusting.
there's a lot going on

 

Was gonna use that moly dry film spray (similar to oem)
It's at most 1.2% open which I was told we could compensate with the tps adjustment
It's the extra airflow that's coming through that's causing the idle being at 2k

Gonna remove the whole thing this weekend and put the moly on there too

Crossing fingers 🙏🙏🙏🙏🙏

 

Definitely use something dry or that dries. Good luck, brotha!

 

This is what im getting
well already bought

 

I use this, probably the same:

 

https://www.evolutionm.net/forums/ev...AfB3HZGqvXpj5c

This is where i got the idea

I figured the 1.2% (at most) throttle being open is gonna be covered by this stuff and i can zero out via tps adjustment

 

Quick update
rerouted my coolant line (basically bypassed the TB)
tightened the BISS, I gauged it with my old one

Idle is back to normal at all facets! 1k~ at idle, neutral cruise, stop lights, everything!

Need to adjust tps slightly as it reads 0-1.6% depending on how hard i jab the throttle before letting off (torque app)