This allows even slight crankcase pressure to combine with intake manifold vacuum to push oil from the lifter valley directly ...

One way to tell if your engine responds positively to more initial advance is by hooking up a vacuum gauge to manifold vacuum ...

Vacuum leaks can develop in many locations, including the intake manifold, throttle body evaporative emissions system, power brake booster, and several other places, because some vehicles have a ...

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The manifold absolute pressure sensor reads the amount of pressure or vacuum (also called “engine load”) in the intake manifold, where outside air is divvied up in proper amounts and ...