Great site you have here. This is my first post hope I do it right. Have a 2003 tracker cel is on , scanner records map is the problem. Went on and drove for about a month even though there was a loss of power and a rough idle. Now it has gone into limp mode . Was not far from home so drove it home. But before the limp mode problem I changed the map actually 4 times but none of those corrected the situation. Took a multimeter found the 5 volt wire, ground wire, so connected the signal wire and ground to the multimeter got nothing,supposed to have 1 volt, so I have read. If that is correct, what would be next? Thanks for any answer. We really like the car but this is driving bonkers.