answersLogoWhite

0


Best Answer

check the upper intake manifold gasket,may have a vacuum leak at high operating temps.

User Avatar

Wiki User

19y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What causes a whistling noise in a 1990 Ford pickup with a six cylinder when the engine is hot and you let up on the gas or when it idles then sometimes it stops completely?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions