Well im not exactly sure if im pinging or not its a weird sound and it sounds like it to me. And it only does it when I get on it really hard getting on the freeway. Only problem is it is only like 70 degrees out and it still happens and before I changed the stuff below it would do it when it was like 40 degrees out at night. And I have ran nothing but 91 octane in my car for the last year and timing looks to be at about 10. Ive Replaced the Fuel Filter Cleaned the Maf Replaced the Air charge temp sensor Ran Seafoam Replaced plugs New Ford Racing 9mm Wires And I just put in some Lucas fuel treatment to see how that works I am kinda running out of ideas here??? I dont really want to do the O2s they look fairly new and are like 60 bucks a pop. :gtfo: Any Ideas? I am getting sick of it and want to run more timing and have 93 cobra intake and 70mm throttle body ready to go on but doubt that would do anything but make things worse. Thanks.