Join Date: Jan 2003
Location: Rapid City SD, Black Hills of South Dakota, Queens NY
If the engine doesn't stall or decrease rpm dramatically with the idle air tower blocked, the problem is, most likely, the throttle bores are not completely closed (like they should be at idle). It's also likely that the relay crank idle stop and wide-open stop screws are not adjusted to spec.
Just get an o-ring that fits inside the bore the idle air adjuster. I've found that it makes almost no adjustment in the idle speed. As long as you're getting 600-900 rpm at idle, that's good.
Last edited by Roadtrip; 02-12-2017 at 09:46 AM.