I noticed a whistling noise a few weeks ago. It seems to be coming from the area around the throttle body.
Hopefully the noise is audible in the video, which I’ll try to post in a few minutes.
Supplemental info:
- I do not hear it at all in the first few minutes after a cold start, but it appears once the engine gets to operating temperature.
- it’s subtly present at idle, but any minimal pressure on the throttle makes it louder, even if the throttle isn’t moved enough to raise the RPM. It seems to go away when the throttle is opened enough to rev the engine (although it may simply be drowned out by engine noise).
- I replaced the throttle body gasket a few weeks ago. Used a Fel-Pro, and tried to be careful about cleaning the mating surfaces without scratching them.
Hopefully the noise is audible in the video, which I’ll try to post in a few minutes.
Supplemental info:
- I do not hear it at all in the first few minutes after a cold start, but it appears once the engine gets to operating temperature.
- it’s subtly present at idle, but any minimal pressure on the throttle makes it louder, even if the throttle isn’t moved enough to raise the RPM. It seems to go away when the throttle is opened enough to rev the engine (although it may simply be drowned out by engine noise).
- I replaced the throttle body gasket a few weeks ago. Used a Fel-Pro, and tried to be careful about cleaning the mating surfaces without scratching them.