Hyundai Elantra GT banner
1 - 9 of 9 Posts

·
Registered
Joined
·
6 Posts
Discussion Starter · #1 ·
Anyone notice a gurgle and hesitation after starting their car just before the idle drops? Mine sort of gurgles, seems to miss a beat, and then drop the revs fine. I'm just curious if that is normal...
 

·
Registered
Joined
·
44 Posts
Anyone notice a gurgle and hesitation after starting their car just before the idle drops? Mine sort of gurgles, seems to miss a beat, and then drop the revs fine. I'm just curious if that is normal...

Yup. It’s the normal cold start tune. The bypass valve opens in cold start and basically creates a vacuum leak. That gurgle is the bypass valve closing and the ECU compensating for the vacuum changes.
 
1 - 9 of 9 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top