A week ago I installed on my b18c1 the Skunk2 ultra street manifold and Skunk2 74mm throttle body. For a week everything was good. Idled good, 1500 until it warms up then idles at 900. . No problem.
Now 2 nights ago I'm driving around and the throttle get stuck open at like 5k rpm. And back firing like crazy.
Anyways ive read that these are a common problem.
Does anyone have a fix? I just emailed Skunk2.
I've search all over and just found a bunch of nothing.
I've tried cleaning it out, adjusting the stop screw and idle screw.

And now today. After I got it all back together. It is idling high 3k then drops to 1.5 like it should be. Car warms up. And it it goes up to 2. Idle screw is completely closed and stop screw is not in. Please help.

 

What throttle body do you have? The new or old style throttle plate?

Have you checked all the nuts for the intake manifold, the thermal gaskets tend to need to be retightened depending on how it was originally installed.