[exitwound]

To not mud up the other thread about idle, I thought I'd keep the ISV chat here.

The problem
The car idles at ~500 rpm when the air temperature is cold (<50F). Until the engine warms up (about 2-3 minutes), it's very sluggish to stay running, but VERY STABLE at that RPM. Very little lapping or swaying of the RPM which leads me to believe it's not a vacuum leak. When the car warms up, the idle is set to run at 1000-1100 rpm and does so with again no swaying. It's rock steady on the idle rpm.

Test #1: ISV Clamping
I clamped off the hose going to the ISV from the J-boot/airbox while the engine was off. I then started the car and the car idled ~500rpm. No change.

While the car was running, I took off the clamp from the hose and there was again no change in the idle speed. Still hovering around 500rpm.

Test #2: Diagnostic Bypass
While the car was still cold, running around 500rpm, I bypassed the ISV with the use of the diagnostic plug. I jumped ports 2 and 5. No change in the idle.


If the ISV was indeed being disabled by either of these methods, shouldn't I see something?