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Joe, have him unplug the 3 bar MAP and see if the system appears to be running normal. If so, then the problem points to the MAP sensor.
At that point, next move is to confirm 5 volts on the MAP sensor gray wire, and confirm Ground on the black wire.. if so.. the green wire key ON should be ~1.6volts. If the green wire is 1.6 then my system should not be running.
My thoughts.. dirty or bad contacts on the MAP plug black ground terminal.
Hit me back,
Julio
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89 TTA Stock appearing 
10.550 at 132.22 1.539 60ft 3850 race weight w/driver
Always on 93 octane
www.alkycontrol.com
727-570-9999
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