Sorry for the late response, but I just did a compression test and it turns out all's cylinders are low. #1 and #2 are 135 psi #3 is at 120 and #4...
Yes I closed back up the air box
Yes I am 100 percent sure.
Fuel pressure is good I already put a new air filter and cleaned the MAF and nothing happened.
I have a 2006 mazdaspeed6 BONE STOCK. Around 3500 to 4000 rpm the car hesitates and stalls almost as if the car is literally turning on and off....
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