Changed tune now pinging

[Mel Pilgrim]

Recently I change my program tune back to stock, then to the 87 performance tune. Now whenever I step on it, I can hear the 4.6 pinging. Has anyone experienced this? I like the shifting of the 87 performance tune but do not like thing pinging. I was thinking maybe resetting everything by removing battery terminal. Thoughts? :banghead::banghead:

Mel

 

[Robert Howell]

Try different brand of fuel. In Canada I can run most 87 octanes except any made by Shell, every time we fuel with Shell we get mid throttle detonation.