I have a 95 interga gsr and its idling really ruff. it fluxuates between 1,000 and 2500 rpms at idle. there is no check engine light and if its a vacum leak its sneaky. has anyone else had this problem or no how to go about fixing it any help would be awesome.

 

first steps to fix a fluctuating idle are cleaning the fast idle thermo valve and idle air control valve.

 

is that the valve on the bottom of the throttle body

 

Did this happen out of nowhere and all of a sudden or have you done some work lately?
Clean that FITV on the bottom of the throttle body and the IACV.
There are plenty of write-ups all over the place.
Reply back when done, let us know what happened.

 

i have swaped the iacv and i just tryed cleaning the fitv but im not sure i got it well enough couldnt get the coolant inlet off but as it stands still fluxuates

 

it could be vac leak make sure you torque the throttle body bolts to spec i think its like 20ft lbs and check for a cracked brake booster hose

 

Make sure TB is clean, bolted. Check for Vac leaks. I come from DSMs and that's usually the problem and the easiest fix.

 

its definately not he FITV i took it to a local machine shop and sand blasted and cleaned everything still idles rough

 

Thanks for all your help guys it ended up being the adjustment on the tps.