Where is the AIR hooked up on 1986 corvette from check valve to engine?

On a 1986 Corvette (with the typical L98 TPI engine), the Air Injection Reactor (AIR) system's path from the check valve to the engine isn't a single, simple line. It's a more complex arrangement involving several components and passages.

The check valve prevents backflow from the engine into the AIR pump. From there, the air travels through:

* AIR Pump Discharge Pipes: These pipes carry the pumped air from the check valve to the distribution manifolds.

* Distribution Manifolds: These manifolds split the air into separate lines heading towards the exhaust ports.

* Individual Ports in Exhaust Manifolds: The air is injected into the exhaust ports, *not directly into the engine cylinders*. This is crucial. The purpose is to help the catalytic converter reach operating temperature quicker, aiding emissions control. The injection points are within the exhaust manifolds, close to the exhaust ports.

Therefore, there isn't a single, easily identifiable "hookup" point from the check valve to the "engine" in the way you might picture. The air is injected into the *exhaust system* to aid catalytic converter efficiency, not directly into the engine's combustion chambers. Tracing the lines from the check valve will lead you through the distribution manifolds and into the exhaust manifolds themselves.