code 41 91

Finding vacuum leaks is a lot like going fishing. It requres some luck and some skill.

Use a vacuum gauge ($17 at most auto parts stores) to determine if a leak is present. You should see 16.5"-19" of vacuum at 650-725 RPM with a stock cam. More vacuum is better

Use a squirt can of motor oil to squirt around the mating surfaces of the manifold & TB. The oil will be sucked into the leaking area and the engine will change speed. Avoid using flammable substitutes for the oil such as propane or throttle body cleaner. Fire is an excellent hair removal agent and no eyebrows is not cool...

check the PVC hose under the upper intake. Mine was bad, they are exposed to high heat and will get hard and crack