The engine would still run with a bent or broken valve, but it would run rough. Noise may or may not be significant. You can do a compression check if you think there's a valve problem. First, I'd put a vacuum gauge on an intake manifold port and see if the vacuum is steady or if it flutters. If it shows unstable vacuum at idle, there's likely a valve problem.

When was your last tuneup?

Frank

'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum