So I just got done installing my top swap on my 04 grand prix and the car will not run with the MAP sensor installed. I can get it to start one time with it plugged in and it runs alright but if I shut it off it will not start up again and if I run the car for about 5 minutes it will shut off and not start again. When I unplug the MAP sensor the car runs great. Any help? My scanner say it is seeing 9 volts and it should only be seeing 5, I went and got a new 2 bar map sensor and it is seeing the same thing. The cars PCM was tuned by ZZP. Also there is a weird squealing noise that comes and goes, is that just a supercharger belt or is that more likely a bearing or coupler inside the SC snout? Thanks for the help,
Mike
Mike