Hi everyone,
My 94 GT started recently to do a whistling or whining noise when starting the engine cold. It does it only at specific rpms, around 2000 and 1100. The pitch also changes slightly with the rpm. It's coming from the engine bay and it's not super loud, but easily hearable. I have the feeling it has to do something with air currents. Sounds like blowing a whistle.
It goes away when the engine is warmed up.
There's a video below:
I did not yet have the chance to locate the source because it does not do it at idle and I did not have anyone around to set the rpm while I look for the source.
Do you have any idea what I should look for?
Engine is stock with only a K&N filter inside the stock air box.
My 94 GT started recently to do a whistling or whining noise when starting the engine cold. It does it only at specific rpms, around 2000 and 1100. The pitch also changes slightly with the rpm. It's coming from the engine bay and it's not super loud, but easily hearable. I have the feeling it has to do something with air currents. Sounds like blowing a whistle.
It goes away when the engine is warmed up.
There's a video below:
I did not yet have the chance to locate the source because it does not do it at idle and I did not have anyone around to set the rpm while I look for the source.
Do you have any idea what I should look for?
Engine is stock with only a K&N filter inside the stock air box.