4age 20v idling problems

[20vceli]

Right now I have a 4age 20v silvertop with a blacktop ecu with open itbs, I have the map sensor tee into the vacuum line underneath the itbs. The problem is right now with the isc capped it idles at 800rpm but is rough/stalls easily. If I just leave that line off, the idle jumps to 2500rpm. Do I have the route the line to metered air like it was before with the silvertop ecu. It idled at 2500rpm before as well

[yoshimitsuspeed]

Did you make sure the dashpot in the middle of the ITBs is hooked up to vacuum? This is probably the most common cause of high idle in the 20v.

[morgan]

from the factory, the ISCV draws air from the air box, so open its high idle, capped its low or stalls. take the cap you have and drill a small hole into it, under 0.100" in diameter. enlarge it a little at a time as needed to get the rpm's you want.

[phanist]

Use the smallest hose u can find that fit and put an air filter there