Installed new carb on 22r motor, (New motor). 1987 truck. I think the vacuum lines have been messed up for a while, even before the new install. Starts up perfectly in low idle, but does not go into high warm up idle? When its warm, idle goes back to a higher idle, about 900 rpm. These two scenarios should be opposite, Which vacuum lines should I look at? any suggestions ?? thanks.

 

Realy?

 

Download the fsm from here, it will show you the way. Use the search, its your friend

 

There is a vacuum line diagram under the hood, might not be there still.

www.ncttora.com/fsm

:wabbit2:

 

If you don't have to smog the truck, cap everything but the vacuum advance. Your idle will pick up a bit as the truck comes up to temp, at least every carbed vehicle I've ever had has. Sounds like you just need to set your fast and slow idles and you should be good to go. Make sure the choke is opening fully as well.

 

thanks