does anybody know if there is a difference between a regular GM map sensor and a so called power stage? they both seem to be the same thing...is there any difference in maybe tha calibration or reading of the manifold pressure that these two give out..?

 

A power stage has nothing to do with vaccum. There is no vaccum line that goes to the power stage.
The power stage controls the ignition system.

 

ok im confused.. im sure u know what im talking about...the map sensor covered with metal... any difference?

 

this is on a 1990 ...940 2.3 non turbo
would replacing it with a Gm map sensor make a diff.?

 

I haven't tried as of yet.
Do they look 100% the same besides the metal cover?
Alot of GM parts were used on a lot of cars and just changed a little to be made their own.

Here is a story for you. My old Shop manager has a Lotus. The ignition module went bad. Lotus wanted $375.00 for the module.
When he looked at it it was just a GM ignition module that was glued to a peice of Alimunum.
The GM part at the local Parts srore it was $15.00.

 

it worked, a 70 dollar GM part, which in fact i got for free since I work there,can be replaced in place for the $170 volvo map sensor.they are Identical and work great..

 

Cool glad all went well for you.