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Message: <blockquote data-quote="reivaxtorres" data-source="post: 271813" data-attributes="member: 8890">joshmartin,looks like you got the issue solved, but i figured i would chip in a little and tell you what i saw in your video. to me, it looks like your car also has a full PI swap. the intake manifold looks like its the PI one, and the valve covers look like those of a PI windsor engine (on 96-98 mustangs, the oil fill tube should be on the drivers side). if this is the case, your compression ratio is higher than that of a normal mustang and that is something that needs to be addressed in the tune, but i guess you got that one covered already. a few easy ways to tell if you have the PI swap done:1) for the intake manifold, look to see where the #1 intake runner leads to. if it goes to the #1 cylinder (the one closest to the front of the car on the passanger side), then its the NPI manifold. if it goes to to the #5 cylinder (cylinder closest to the front of the car on the drivers side), its the PI manifold.2) count the number of valve cover bolts. 11 per side = either NPI or PI, 13/14 per side = PI. and for reference incase you dont know (since you did state this is your first mustang):NPI = Non-Performance Improved. basically this is what ford called the heads, cams, and intake manifold on the 96-98 GTs. restrictive compared to the PI counterparts.PI = Performance Improved. what ford called the revised versions of the heads, intake manifold, and cams. used on the 99-04 GTs. basically this was the reason why in 1998, the GT was rated at 225hp/290tq. in 1999, it was increased to 260hp/302tq.</blockquote>