I need help I have a problem with my gsr when i cold start it it has miss fire i have to wait for 5 mins and then i can drive off it happens every time i let it set more then 1 hr the only code its giving me its number 10 and i fit it ones all ready and it does the same thing. If i unplug the map sensor it will runs good but when it reaches normal temp it starts to run nasty i was wondering if anybody could help me out

 

I'm going to help but whenever you post please list your year, make and model. Also try to use punctuation as it'll be easier to read. Did this happen all of a sudden or did it happen right after you swapped it? What ECU are you using? You may have some connectors swapped around if it happened right after the swap.