Noisey V-6 when warm

[albeit]

I have a 2000 Toyota Solara SLE V-6. After getting hot, shutting the engine down for a half hour to an hour changes how the engine sounds. When warm the engine has a weird vibration under acceleration that goes away again as the engine heats back up.

The noise is not present when the engine is cold.

Also, there has been a loss of power, maybe 10%, over the last year.

Any ideas on what might be wrong? THe dealer says nothing can be found inthe data coming from the engine.

Thanks!

Al

[lostru]

This is just a WAG but I think you may have a weak fuel injector. It would show that it is still good but not be delivering the proper amount of fuel. If they have checked it then I am at a loss. How many miles do you have?

[albeit]

I have about 80,000. I have not had the injectors checked but I will look into it.

Thanks!