Ok Im just trying to do a few preflights before instalation. I have a plx m-250 so my pre cat 02 is ok keeping the cat so my after cat 02 is fine. its an eco so no egr. But I am worried about My mas air pressure sensor. I belive that I have to bleed it off with some tee vavles does any one have the location and a bit of a right up. and am I missing and sensors?
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Kick azz is my boost hero!!! 
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Some people have to do it, some don't. The check valves are only like $1.25 at any auto store (Called a 1-way check valve). Your MAP sensor will be on your intake manifold either attached to the throttle body, or attached to the intake manifold. its a flat sensor with an air tube on it. On the 2.4's it was bolted to the throttle body but the air tube ran to the front of the manifold.
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sorry ive been away where do you imagine the sensor would be. and why wouldnt some people have to do it?
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Kick azz is my boost hero!!! "
Top of intake manifold below fuel rail
Because the MAP sensor is a 0 to 5v signal, and 0-14.7PSI sensor (1 BAR). 14.7 PSI is the pressure at sea level, so when your throttle is fully open (showing 0 vacuum), you are at the full signal that the MAP sensor can push out. Adding more PSI won't make the MAP sensor send more voltage, so it doesn't matter if it goes any higher and you vent it off to atmosphere. The ECU can't see boost at all, so anything after 0 PSI isn't being seen by the ECU.
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so is there any reason at all to run a check valve?
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Kick azz is my boost hero!!! "
it can also phycically damage the sensor if you are running high enough boost
ASE Master Certified Automotive Technician
