I would get the fuel pressure checked?It may be the fuel pump going bad.What does the weird noise sound like?example......grinding,whislte,clunk,etc???
Anything and everything can and will happen. Murphys LawWould the fuel pump go bad at 16,000 miles? The noise sounds like whistling.[/b]
Yah your right sorry bout that, I've been all over today Forgot that mazda does this. Definetely makes a more difficult diagnosis.....Is the whistling noise constant and do you hear it for about 3 seconds when you first turn the key to the 'on' position? (Not start) If so, that is probably your fuel pump making the noise.
Last I checked, we don't have an IAC motor... the electronic TB obsoletes this circuit/system on the 2.3L. The TB is monitored pretty closeley by the computer so if it messes up, you'll usually get a CEL.[/b]