I got a s-10 with a 350 TPI. I got it hooked up to a snapon scan tool. The readings on the MAP at idle are 22HG.....3.5 volts. According to some graphs i seen those numbers dont line up??? Ive done searches and found that my wiring is correct Can Anyone help me?

 

Ya, idle should be lower voltage..around 1-1.2v

Do you have the correct MAP?

 

Well I tried 3 different ones ...nothing. But on a gragh i read around here somewhere 22hg does not equal 3.2volts. If I am not mistakin isnt 22hg pretty good vacuum?

 

Yes, very good for idle...you sure you have the correct MAP sensor for a 90-92 TPI F-body, not just one you think will work?

 

well i thought a map sensor was a map sensor unless it was for a turbo?
Does it have to be just a 90-92 F-body TPI. I'm sure one of them is from a 89 chev van TBI.