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I too have this issue but it doesnt stall. The rpms just drop and dont come back up. I've got a stock GSR ecu, I've replaced the throttle body, fiav and the isc so I highly doubt that these three things are faulty. My very limited mechanical and electrical knowledge/experience assumes something...

I did look at buying just the FIAV from Amayama, but both my original TB and 2nd hand screws were stripped so I can't even take them off.

Yeah I just went the long way around to fix this problem. Eliminating one thing at a time until there was only one thing left that it could've been. In the words of Borat - "Great Success!"

Ok after a long process of elimination I have fixed my idle issues! :) I bought a 2nd hand throttle body which came with the FIAV. I cleaned it thoroughly like it was brand new. Took off my old throttle body from my car, and put the ISC and TPS onto the 2nd TB I bought. I did this because I know...

All good, I figured it out now :)

If its not trouble then that would be awesome.

Mine's labelled P, E, A but only on the throttle body. Intake Manifold has nothing.

Hi Just a question about the topic title, which lines go to which? Currently the throttle body just loops back into itself and same with my throttle body? Is this correct? I got a feeling its not ...can someone show me how its suppose to be? Thanks in advance [sharedmedia=gallery:images:302]...

All good, just ordered one from someone in your neck of the woods :P

Is a stock Evo 1/2/3 throttle body a direct swap for a GSR 4G93T?

At this point I'm willing to try anything, what is the size of the throttle body for a 4G93T? Could you use the throttle body from a 4G63 on a 4G93tT? Is it a direct swap? Would this be a direct replacement...

Yep, its due for a service soon, will ask mechanic to look at injectors, thanks.

No vac or boost leaks, ISC was replaced a few months back (the problem I'm having was occuring before the new ISC was put int, that's why I replaced it - thinking that was the issue). I have no idea about the injectors. I'll put the TPS back on and make the adjustment - hopefully that's all the...

Ok, so my TPS is fine then? No need to get a new one? If so, then what could be causing my idling issues? Only thing I can think of is the ECU...

Hook up some jumper wires (Alligator clips) to the TPS. The POS+ to the Number 1 terminal and the NEG - to the number 4. Measuring the resistance, set meter to Ohms. It should read 5K Ohms. This is the resistance in the closed throttle position. Mine reads 4.76K Ohms Now, move the POS + jumper...