Acceleration high pitch noise from motor

[s14kings]

So I have this noise coming from my motor (i think since its from the engine bay) and I have no idea what it is. It occurs when I accelerate between about 2k - 3k rpm. It's a high pitched noise when I throttle but doesn't occur when it's in neutral. Noise occurs throughout all gears, but not as much when in first. I thought at first it was pinging from low octane but I've been pumping 91 for a while and no change. It's also not a vacuum leak. Any help? Thanks.

*edit* I have a ka24de

[scuba_steve91]

My ka24e does the same, kind of. When I drive from 2k-3k rpm, the engine starts getting unusually loud as it approachs 3k. Similiar to your problem, it occurs in all gears. Maybe it has something to do with our compression.

[s14kings]

Could anyone help us out? I'm stumped on this one...

[artdrifter]

wish i could help but i have the same problem with my SR. i'm about to take it to Amerikajin to get it fixed

[s14kings]

Help? Friends and a mechanic couldn't tell me what it was either.

[alzahakar]

A slipping belt perhaps? 2500-3000ish is when the belt will start slipping on the water pump pulley when you have a bad fan clutch.

[98s14inaz]

PS pump makes a whine when it is going out. Also make sure you have atf in the ps pump. Other than that I got nothing,

[Erjay1]

Maybe someone installed a supercharger while you slept one night :keke:

I'd check the fluid level of you PS pump.

[aziankingz]

i have the same thing and i also have a ps problem.. could it be the powersteering belt/pump going? mine is a kind of whining plus ticking noise at about 2500-3k rpms.. do you guys have ticking as well?

[supreme_1]

i have the exact same problem with my m30. vg30e.

i changed the power steering setup so it isnt that.

if worse comes to worse. take a belt off one at a time on your motor, if you dont hear the noise after you take certain belts off you then found your problem.

[slider2828]

Look at adjustments of the belts. Check for slack also look at wear of the belts as well. Maybe also clean your pulley a little as well.

Check oil levels of tranny and engine, hopefully those are all ok...

[aziankingz]

could it be transmission related?