As the topic says ... I did a search on this to see if it is common, but nothing came up. Anyway right as I hit 3k rpm's I hear the engine making this gurgling kinda sound, it is hard to describe ... it continues through 3.4k and then goes away. It is annoying, and you can hear it when the revs drop and pass through 3k.

Is this normal? Could there be a problem with my throttle-body?

 

check your spark plugs... my car used to do that....

 

check exhaust heat shield for cracks and baffles in A-pipe. The A-pipe has a tendency to rust inside and makes funny noises at certain rpms

 

Before I get flamed which part is the A-Pipe? My assumption would be that it is the piece leading from the exhaust manifold to the cat?

Also, would I notice dimmished performance from cracks in the manifold? I noticed this morning that the problem occurs only after the car has warmed up. It was cold this morning and I wasn't experiencing the symptoms right away.