Quote Originally Posted by JohnnyC5 View Post
maybe a stupid question but if a intake manifold gasket is leaking will it cause a rough idle? If so what should all be replace when removing a intake manifold. simple parts that could have gone bad that should be replaced when thats off.....any help would be nice. i know that i will need a car gasket and the manifold gasket. would it be worth replaceing the fuel pump while its off. it only has 88000 miles on it.
Throttle pivot sleeve bearing = rough idle. Spray vacuum pump oil on the manifold gasket seams -- not carb cleaner. It stops up leaks for a few minutes and smoothes the idle before the oil gets sucked in and burned. Rough idle, imho, is rarely a vacuum leak in the manifold and carb mount. Whoever mentioned refreshing the vacuum lines is right -- but sometimes it's one bad plug wire. Little bit of arc-over through the cable insulation, little bit of miss. You can usually see the spot at night when lights are out.