Originally Posted by
J-DUB
I have a 1989 mazda rx7 gxl for sale. Runs good but i think its not getting any back pressure, its got headers and a straight pipe all the way to the back with some aftermarket exhaust. In other words... its loud. It is ready for paint, allready been sanded and has rust only on the sunroof, also have replacement panel for the smashed one. Looking for trades on hondas prefferably crx will take cash also, make some offers. pm me or call my cell im not on the computer much. 813-842-8894
-justin
I can tell you exactly what wrong with it just from your pics. that damn cosmo racing sticker, get rid of it and all your problems are solved.
on a serious note. your backpressure issue. isnt a backpressure issue. you have a s5. the 5th and 6th port acutators are powered off the air pump. which is removed in your car. well unless you have them wired open or have some sort of electronic pneumatic device then their closed. and hence the lack of power after 4k.
now if your feeling no power at before 4k and then it start to fell right 4-7k then they are wired open and you have lost your lower end torque.