Pinging on mazda protege5

guess post above was not needed as I see that you found your problem on another thread. Maybe it will help someone else though!
 
everyone should replace their intake tube. you will have the problem sooner or later. whether you have the problem or not. our car are just too old.
 
my ES started doing the same thing all i use is 93 gas even yesterday i went for a 180 miles drive but the problem still there
 
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