What would cause this???

[steved]

When I install my granatelli monitor, I got a MIL from three boost codes... with the monitor hooked up, I was getting 3psi of boost with the key on/engine off. Took a bit to get them turned off, and that was after taking the monitor off and taking the truck for a drive.



Does that sound like a faulty MAP??? I haven't hooked the monitor up since, and the light hasn't returned... did I do something wrong???



steved