October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.
Vacuum Amplifier
- Check for adequate manifold vacuum. With engine warm and at curb idle, connect vacuum gauge to hose on vacuum amplifier leading to carburetor venturi port. Attach a vacuum pump to hose and apply 2 in. Hg.
- Disconnect EGR delay timer hose (if equipped). EGR valve should open and engine speed should drop at least 150 RPM. If engine speed does not drop, replace vacuum amplifier.