i gota gsr on boost and yesterday my car starting messing up badly so i checked couple things and i noticed my 3 bar map is getting 4.85v wen it is supposed to be 1.6v. is this a indication that the map is bad or my wiring could be messed up?

 

yes they can go bad. ive had 2 gm (sve) sensors go bad on me over the past 3 or 4 years. air fuel at idle would be the first to go to ****, then the car would run worse and worse.

 

Not trying to jack this thread but i was wondering the same thing with my MAP sensor. Its a omni 2.5 bar and out of the blue my air/fuel will drop to 10.0 and under during idle causing the rpm's to jump from 200-1000 back and forth it only does it every once and a while. Its been back to the tuner a couple of times but like clockwork it doesnt do it when im there only after ive been driving it for a while. Sorry again not trying to thread jack just trying to figure out.

 

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mine is doing the same damn thing. between pin a and b its 3.5 and a and c its 5v. gm 3 bar map. car wont idle at all unless throttle is held

 

i think i found my answer i have been looking for but no one knows what it is lol thanks great help