1989 corvette vacume problem
Thread Starter
2nd Gear
Joined: Dec 2006
Posts: 2
Likes: 0
1989 corvette vacume problem
There is a vaccum switch that bolts to the thermastat housing, it runs from the EGR valve and there is a vaccum hose that runs from the back of the switch and runs somewhere, but I'm not sure where, I can't find the hose ends up. Hope you can help me to locate it.
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Source is from under the throttle body. It splits with one side to the EGR solenoid (thermostat) and the other to the fuel canister - left headlight well. Mine has snapped or simply dropped out of the T connector from time to time. Look around the alternator and you might find the other end.
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
One my 86 a vacuum source comes from the throttle body to the EGR solenoid (bolted to the t-stat housing). On the other side one vac line goes to the EGR and the other vac line goes nowhere. I was told when these cars were new there was a small filter on the end of it. Now when I look at this vac line it just ends to nothing.
Melting Slicks
Joined: Oct 2004
Posts: 2,283
Likes: 0
From: Leeds Alabama
I think , it isnt from your t-stat housing but should be connected to either throttle body or under side of plenum. it COULDNT be connected to your tstat or it would blow coolant into the egr.
