Leyland Car Owners - Manifold leak on V8 motor

Hello Bill,

: I would strongly suggest you retrofit a vacuum canister to your distributor.
: It will greatly help in smoothness and mileage. Also, I would only use manifold vacuum and not ported. I cannot think of any performance builders (street or tract) who recommend ported vacuum.
: That may cure your problem but I think another gremlin is at play.

: That aftermarket intake manifold may have a vacuum leak between it and your heads. I have experienced that problem on one of my own installations.

: Use the old trick of spraying starter fluid around the gasket sealing area while the engine is idling.
: If there is a noticeable change in RPM you have found the culprit.

: Best to you,
: Darius

Technical problem- Detecting manifold leak