# 99 yukon 350 vortec

**URL:** <https://community.cartalk.com/t/99-yukon-350-vortec/38249>\
**Category:** Maintenance/Repairs\
**Tags:** yukon, gmc\
**Created:** [October 17, 2009, 10:05pm UTC](https://community.cartalk.com/t/99-yukon-350-vortec/38249 "2009-10-17T22:05:37Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![44magman](https://avatars.discourse-cdn.com/v4/letter/4/54ee81/32.png) [@44magman](https://community.cartalk.com/u/44magman)\
**Post date:** [October 17, 2009, 10:05pm UTC](https://community.cartalk.com/t/99-yukon-350-vortec/38249/1 "2009-10-17T22:05:37Z")

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normal accelerating is pretty good. but, push the peddle down and forget it, don’t try to pass or merge. pulled the plug on the mass air flow sensor and it ran like new…however problem came back after maybe a month or so…???

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**Author:** ![wizard](https://avatars.discourse-cdn.com/v4/letter/w/a87d85/32.png) [@wizard](https://community.cartalk.com/u/wizard)\
**Post date:** [October 17, 2009, 11:24pm UTC](https://community.cartalk.com/t/99-yukon-350-vortec/38249/2 "2009-10-17T23:24:05Z")

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Purchase two sprays: 1- Mas sensor cleaning spray. 2- Contact cleaning spray.

Clean the MAS sensor screen and then clean the contacts of both plug and receptacle. Don’t saturate the receptacle with the contact cleaner. Good Luck.

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**Author:** ![44magman](https://avatars.discourse-cdn.com/v4/letter/4/54ee81/32.png) [@44magman](https://community.cartalk.com/u/44magman)\
**Post date:** [October 18, 2009, 1:42pm UTC](https://community.cartalk.com/t/99-yukon-350-vortec/38249/3 "2009-10-18T13:42:14Z")

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Thanks, I’ll give it a try…