TBI help
 

I found two open vacuum ports on my '87 305 TBI. Does anybody have a TBI vacuum diagram?

Re: TBI help
 

There should only be a couple. One for the EGR valve solenoid, one for the evaporative canister (on the rad support driver's front), and possibly one going to the temperature valve on the air cleaner. Unless you've got the vacuum controlled heater selector valves, in which case there will be one going there, too. Oh, and the one going to the MAP sensor.

I know yours is an 87, but should be similar to one of the ones on this page :
http://www.autozone.com/az/cds/en_us...rInfoPages.htm

Re: TBI help
 

Thanks! I got a brain bubble late last night and found the same diagram staring right at me in my engine well. One open port was the EGR solenoid vent and the other was the EGR valve itself, I had just knocked off the hose. No wonder I burned throug half a tank of gas going through town!