Marvin1985

iTrader: (5)

Car: 99 civic with ob2 ls swap. On a chipped p28 from phearable.net

Changes: just installed a S2 manifold and an ITR throttle body.

Issue: after bleeding out the system I have a steady idle at 1000-1200 rpms. How should I go about adjusting my idle properly?

Also I had to ghetto my p75 throttle cable bracket to make it work. Is there any bracket that'll work right? Or do I have to make one?

tony_2018

Are you asking if adjusting the idle is any different when your intake manifold was stock, no its the same. If the s2 was a stock replacement than you shouldn't have to do anything but install.

Marvin1985

iTrader: (5)

I was asking on the proper way to adjust idle but I've found it online. So last issue is the throttle cable bracket.

Marvin1985

iTrader: (5)

Well after going through procedure it still won't go down past 900-1000 rpms. That's the best I got it. So close and it's pissing me off. Idle screw on TB all the way in. Checked rotor screw to make sure it wasn't leaving throttle plate open. Tried plugging additional ports on manifold (Pcv valve port) while leaving the pcv open. Nothing has worked fully.

Former User

Maybe the throttle cable is too tight, holding the throttle plate slightly open.

Marvin1985

iTrader: (5)

I can grab the cable and move it up and down about an inch.

Former User

Have you cleaned the TB to see if the throttle plate is sticky?

Marvin1985

iTrader: (5)

Yeah everything is minty cleaned. I had adjusted TB too much and plate stuck so I adjusted it back.

MyNamesMatt

Have you checked your TPS position? Mine was idling high and running rich because it thought throttle was more open than it actually was.

Marvin1985

iTrader: (5)

Tps is stock and untouched. Thanks for the idea though. I'm gonna go over the car again and also take pics.

tony_2018

I'd still check it.

MyNamesMatt

Did you not install your ITR TB? If so, you need to monitor ohms/voltage as you're screwing it in. It will move ever so slightly and throw idle off.

EpHatchy

common problem with a stock throttle body and skunk2 manifold is the gasket doesn't completely seal. I bought a gasket from Honda and from oreilys and same problem. the mating surface between the intake and throttle body leaves a small space open between the throttle plate and the iacv port. I had to make my own gasket out of a cereal box. problem went away.