High Idle with BBK TB
Thread Starter
Cruising
Joined: Jul 2003
Posts: 12
Likes: 0
From: Pullman WA
High Idle with BBK TB
I installed a 52mm BBK TB on my 85 with a manual tranny a few weeks ago. I disconnected and reconnected the battery. Everything was working great with idle about 800 RPM, but slowly the idle speed has crept up, and now it is 1500 RPM. Any ideas about what is causing this slow increase in idle speed
Instructor
Joined: Sep 2001
Posts: 131
Likes: 1
From: Chandler AZ
Sounds like you might be getting too much air flowing around the throttle blades. I bet the IAC is going full closed as the engine warms up, but it is not enough. Try adjusting the idle stop screw to close the blades just a fraction. It doesn't take much leakage around the blades to get an increase in idle speed.
You could also have a damaged IAC.
You could also have a damaged IAC.
