rough idle?

[zeiss150]

Hey guys, can loose valves (or tight valves) cause a rough idle? What else can cause a rough idle.

Thanks guys, Matt-

Rock on Z people!!!

[z_boi]

intake leak. or vaccum leak.

[MikeW]

Originally posted by zeiss150

What else can cause a rough idle.

Missing on one or more cylinders? Check that you've got a good spark. An easy way is to crank it up and carefully pull off (and then replace) one plug wire at a time. Each time you pull one off you should notice an impact on how it's running. If you pull off a plug wire and don't notice any difference then that cylinder is not firing. If that's the case it could be the plug, the wire, the cap, etc.