Hello everyone i rarely post on this forum but i am having a weird map sensor issue on my 92 integra. I finally got my built motor and got it into the car and got everything hooked up and ready to start when it fired it ran great for 5 seconds and fell on its face. Also a solid check engine came on. I jumped it and code 3 popped up which is map. Tried a new map sensor and no luck. Tried 2 more and same results. I used the haynes manual and did the procedure to test the map senor and voltages and eveything checked out. Also tried 3 of my other chipped ecu's and same issue. Also Bypassed harness and wired it Straight to ecu.. I am at a lose at what the hell is goin on. I have built many hondas and have yet to have this happen.. Any input?