View Full Version : Rough Running

02-01-2005, 02:50 PM
Okay, i have a 91 st auto, already know there is a crack in the exhaust manifold...
at a stop light, car has been running fine all morning, turns green, hit gas and it just starts running very rough, shaking at idle, and at low rpms. pull over, oil level is fine, its tough to find any different noise because the manifold crack sound is overwhelming, but i know that the exhaust sound is worse...
any ideas? thanks

02-01-2005, 03:57 PM
You should fix that exhaust manifold problem before looking for anything else. You can find both stock replacements or tubular manifolds (header). The problem also sounds like it could be a misfire of some sort, so I would check/replace all of my ignition components (plugs, wires, distributor cap and rotor), especially if I didn't know when they were last replaced.

A broken exhaust manifold could certainly affect scavenging, hence the poor power.

02-01-2005, 04:45 PM
yeah, i have a new manifold, just haven't gotten around to installing it. thanks for the tips, ill try all that stuff after work today.