Does this look like a GM 3 bar map sensor??

[turbobuick1]

Hey guys, I got this sensor on ebay, and I'm curious if this really is a GM 3 bar map sensor? I've looked up pictures on the internet, and most of them do not look like this, but I did find an example that did. What do you guys think?
Is there a way to tell for sure visually, or maybe some way of rigging this up to check if it can read over 14.7psi?

 

[turbobuick1]

And at the risk of sounding like an idiot, I have no idea how to post a pic in a a thread! Can anyone clue me in on this?

 

[DR BOOST]

what are the numbers stamped into it?

 

[turbobuick1]

It has "1008H28" on the side of it. Aside, from that, I can't find any numbers inscribed anywhere on it except for the normac A B an C marking the terminals.

 

[turbobuick1]

Here's a link to the number on the side of the MAP sensor in question.
Any help I can get, I appreciate it! What a hassle, if they did send a non 3 bar sensor. Hopefuly that's not the case....

Another View Of It - TurboBuick.Com Gallery

 

[Beast_TR]

Not looking good, the 3 bar MAP I just got from Razor's Alky kit says 1008G23, hope that helps.

 

[pacecarta]

hook it up in your car , key on - motor off.. it should show 1.6v center pin if its a 3bar

 

[turbofish38]

Any other numbers on it? Cast in or inked/laser etched?

 

[turbobuick1]

No nothing, just the "1008H28" inked in the side, other than that, is is blank.
Pacecarta, If I get time tonight I will measure the voltage on the center pin tonight in my car, if this is a for sure way of knowing it is a 3 bar.

Thanks for the responses guys, anybody else who wants to chip in is more than welcome!

 

[pacecarta]

yes

input voltage is approx 5v
1 bar = 1 atmosphere = 14.5 psi (vacuum or pressure doesn't matter )


if its a one bar map used on NA applications its range is 1 bar and thats vacuum only since atmosphere is already at 14.5psi which we see as 0psi on gauges
so key on eng off it will be almost 5v , will show 0v at 14.5 psi vacuum

if its a 2bar (stock gn) its operating range is as name implies ... 2 bars ...... 1 bar vacuum to 1 bar pressure or 14.5psi vac to 14.5 pressure
14.5 vac = 0V
0psi = 2.4V
14.5 psi pressure =5V ,
voltage will be 2.4at 0psi it will be in the middle of

if its a 3 bar the sensor range is 3 bars
so 14.5 psi vac = 0v
0psi = 1.6v
14.5psi = 3.4v
29 psi =4.9v