TXjeepTJ

iTrader: (8)

Makes a weird chirping/ball bearing/referee whistle noise. Soft driving it doesn’t do it, only does it when I go over 1/3 throttle and starts at around 1,500RPM

its definitely not the belt, as I removed it and the noise is still there

G Atsma

Sounds like ignition knocking. Cheap gas? Knock sensor(s) gone bad?

TXjeepTJ

iTrader: (8)

I use 93 octane from Sunoco - logging w/ HPTuners, it shows no knock. Been doing it for a while, multiple gas tanks. I just always thought it was the belt, since it sounds exactly like an annoying belt/pulley noise.

I'll hook up the scanner back up to it and really pay attention to the timing.

Ls7colorado

iTrader: (3)

The whistle sound?

TXjeepTJ

iTrader: (8)

Yeah, like that type of whistle with the ball in it that refs use, right before you hear the turbo spool up

Ls7colorado

iTrader: (3)

seems like it gets louder as the engine load increases? does it do it in neutral or just under load?

I had an exhaust leak that sounded like that one time, would only make the sound under load, sounded like a little turbo because it would get louder with more back pressure lol...

TXjeepTJ

iTrader: (8)

It will do it in neutral, but I really have to rev it high, like 4k and it just barely makes the noise. That's a good point, I'll check all the connections!