Idle dropping off

[CyberEye]

Here's the deal. While driving, if I put my foot on the clutch, or slip it into neutral to just coast, the RPM's fall REALLY low, like in the area of 100rpms. Alot of the times the dummy lights flicker like the car is about to stall, but then it recovers. Other times it will stall. Now it doesn't do this all the time, sometimes it drops down to normal idle range.

I checked the ISC motor tonight, resistance on all the pins was around 32.5
What all else could it be??

 

[hewhoisknot]

check boost leak.... u sound the same as the problem i had.... i had major boost leak... check the intake pipe

 

[CyberEye]

check boost leak.... u sound the same as the problem i had.... i had major boost leak... check the intake pipe

I'm pretty sure I have a boost leak, and vac leak . Vac leak since I'm only showing between 10 and 15in of vac at idle. And boost leak since my car boosts/pulls fine untill around 4000rpms then starts to bog and stutter.

I need to fab up an intake leak tester.