This wider portion can sometimes contact the manifold and prevent it from sealing against the head. This can cause a massive ...

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 ...

There are several ways to find out if you have a vacuum leak. First, check under the ... connections and the intake manifold for cracks, breaks, loose or broken seals and disconnected parts.

My five-litre VR Holden Commodore has a big flat spot when cold and hunts on very light throttle. Parts replaced include the ignition module, coil, distributor, injectors, fuel pump, plugs, leads, and ...