My buddy and I, he's a GM mechanic. We hooked the tech 2 up to it this morning and it through the same code: P0108, high voltage in the map sensor. Here's what my truck was doing when the code went off:
Engine temp: 188
Map sensor 103 kpa
engine speed 2295
vehicle speed 64
throttle pos sensor 30%
ign 1 volt: 14.3
IAT 57 degrees

I'm starting to wonder if something is wrong in the tune.

 

It's the tune.

 

Do you think that it could be that my AFM didn't get turned off?

 

Was the boost gradually increasing before it threw the code? Because 103kpa is just barely over atmospheric pressure, at which point the map sensor reads zero vacuum and returns maximum voltage to the ecm. If it isn't tuned correctly, this could cause problems...

 

Yes the boost was gradually increased. I've got the same tune you do.

 

Well if it's not a short in the wiring, it may be a mistake in the tune. Its unlikely, but possible.

 

Well Justin is leaving town tomorrow and doesn't have any ecm's he can send me, so I have to wait till he gets back next week to write me a new tune. It's fine driving around town as long as I stay out of boost, I'm half tempted to try a new map sensor and see if it makes a difference.

 

So it turns out the temp readout on my rearview mirror pulls from the IAT sensor...so now with that underneath a blower, March temperatures are showing much warmer than they rightfully should. Can't wait to get pics of it in Arizona in mid July lol.
It'll probably end up making me get a meth kit...

 

would definitely love to see some track times

 

I think the next open night at the local track is friday, but I'm going to be out of town
Need to get some decent slicks anyway, I can't get enough traction to be competitive on the track.