# Humming sound **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** explorer\ **Created:** [July 14, 2008, 1:55am UTC](https://community.cartalk.com/t/humming-sound/16672 "2008-07-14T01:55:26Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![jbusader](https://avatars.discourse-cdn.com/v4/letter/j/eada6e/32.png) [@jbusader](https://community.cartalk.com/u/jbusader)\ **Post date:** [July 14, 2008, 1:55am UTC](https://community.cartalk.com/t/humming-sound/16672/1 "2008-07-14T01:55:26Z")
1998 Ford Explorer Sport V6, 2wd, manual trans, 150,000 miles. Lately i’ve been hearing a humming sound coming from the engine when i’m stopped. The sound goes away when I start to accelerate. Doesn’t seem to be a problem in cold weather. I’ve recently changed the radiator hoses and i know my upstream 02 sensors need replacing. I’ve heard this may be a fuel pump problem. Thoughts? ---
**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\ **Post date:** [July 14, 2008, 10:43am UTC](https://community.cartalk.com/t/humming-sound/16672/2 "2008-07-14T10:43:22Z")
The fuel pump is located in the rear of the vehicle–on the gas tank–so a noise coming from under the hood is unlikely to be fuel pump related. Have you checked the exhaust heat shields? While heat shield noises are usually more of a growl or a rattle, it is possible that this could be something as simple as a loose heat shield.