Weird sound from engine...

blown11

Registered User
Okay while driving my engine makes this odd sound really hard to explain but its like constant with the pistons, like du du du du du dudu really fast and it gets faster as it revs higher. The car does not seem to have any power loss. Please help.
 
While cruising or just accel? New plugs+wires? Are you running a trusted 91+ octane fuel and have you ran injector cleaner lately?
 
The sound is there at idle and at accel. I have new plugs as of 2months ago, and ran fuel injector cleaner the other day, but ran 1.99 stuff. Use shell 93 octane gas.

Anymore ideas?
 
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