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So I got a 95 GSX with minor mods. The most extensive engine mods are UICP, 1G BOV, LICP, MBC, Intake Pipe and K&N conical Filter.
History:
1 year ago got idle surge bad. Replaced the ICS wwith a used one. Ran fine. Then started acting up again two months ago. Bit the bullet and took it to the Mitsu dealer. They told me ICS. But wanted $400 to fix it. Sorry I've owned my GSX long enough to know how to change a ICS. Anyway I got a brand spankin New ICS. Put it in and my car idles at 750-800RPM.
Problem:
Now when I start it and drive all is well. But if I turn it off and get back into it then we have it surging to 1500rpms. If I hit the gas and bring it up to 4500 RPM quick it will then drop back to 750-800 RPM. Then it will start again. It seems to only happen if I've driven it for awhile and then turn it off and shortly hop back in it again. I would estimate the time to be about as long as it takes to fill the tank at the Gas station.
What I've Found:
when it is surging I have popped the hood and then inspect the Throttle cable. IT's not super tight and also not super loose. But I can actually put my thumb on the assy that the Throttle cable attaches to and push it closed. The idle then drops to 750-800RPM's and all seems well. But it will come back in a bit.
Questions:
What can it be?
Dirty throttle body, when it heats up there is some sludge or gunk in there that blocks the Butterfly? That is what I am assuming.
PVC valve going bad?
Any ideas would be greatly appreciated
Thanks
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