Hi guys, hope someone can help me out here.

Ive got a 97 spec JDM SiR2 integra, ive changed the inket manifold for a venom type inlet manifold. The problem is that im having idle issues. When the car is started from cold, it idles at 2100rpm approx, when it warms up, it fluctuates from 900rpm to 1600rpm.

If the car is parked, and engine is warm, the revs are going up and down, but if i put the car into gear and start releasing the clutch slightly with foot on brake pedal, this drops the idle (as it should) and if i hold it there for a couple of seconds the idle will stay there, even after taking it out of gear.

When i rev it again, it starts to rev up and down again.

I have checked all the pipe work for any vaccuum leaks, also cleaned the idle speed control valve with carb cleaner but still same trouble.

ive done a search on this but had no luck, i heard that this is common with GSRs in the states, and im hoping someone can help me in someway.

Much appreciated

wai.

 

Vacuum leak is most likely the source....they can be a little hard to track down but if you unplug the IACV does the bouncing idle go away but it still idles high or does it idle at 600 where it should (with the iacv unplugged)?

 

Is there a check engine light on?, most likely a vacuum leak for sure since you changed out the intake mani, did you mess with any lines or sensors? check TPS and MAP plug might be loose?

 

You should adjust your throttle screw, I had the same problem, but once I messed with it, it was all good.

 

All sensors on properly and no check engine light is on, i will try to adjust the throttle and post any progress.

Thanks