nautskye

It may be PS pump but shouldnt I not have any noise coming from that? I mean that makes me think I have air in the system???

are you referring to a hard "chunking" sound like hail or something more like an intermittent puff of air? I have the latter, I'm hoping it's my PCV valve. I can hear it mostly through the wheel well.

Mine is more like the latter too. It goes off/on for a second or two when I cold start the car. I don't know if it continues when I drive because of the road noise. I can't tie it to anything I.E. turning on/off A/C or turning the steering wheel- reving the engine etc... Can you hear it in the cabin at all?

Hello everyone,

There is a noise that seems to be coming from my engine bay in my '91 LS400. I can't really think of any other way to describe it other than calling it the noise of a hard drive doing reading/writing. It's intermittent and I can't hear it if I am not sitting in the car with the doors closed. Any Ideas?

Thanks!