I have an integra ecu in my crx and lately iv'e been getting a "surging" while driving. i noticed that my s-afc under throttle percent goes from like 4-5 % while crusing to 0 back to 4-5 kinda weird so i replaced the tps and i was wondering if the integra computers have a case ground. i didn't switch the ecu housings either.. anyone had this problem before..????