Jump to content


Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse
 

Photo
- - - - -

location of atmospheric pressure sensor?


  • Please log in to reply
3 replies to this topic

#1 gsheng

gsheng

    New User

  • Members
  • Pip
  • 5 posts
  • atlanta

Posted 22 December 2004 - 04:18 PM

Could you tell me the location of atmospheric pressure sensor in my 1991 legacy wagon subaru? a experienced technician said only replace whole ECU. However, I saw some webpage I can set sensor to over 760mmHg. some people know that? thank you very much
guoqing

#2 MorganM

MorganM

    Do you Subaru?

  • Members
  • 8,390 posts
  • TwinCities

Posted 22 December 2004 - 04:55 PM

I belive only the EJ22Turbo models came with a MAP in your generation Legacy. Is this a turbo model? Otherwise you should just have a MAF there by your air box where the air filter goes. Realy easy to tell as there is a black box on top of a metal tube with a plug and wire cluster going to it.

RARELY is the computer bad but it IS a possibility. Is your Check Engine Light on? If so you can pull the codes yoruself and it will tell you exactly what it thinks is wrong. Then you have atleast somewhere to trouble shoot from.

#3 Legacy777

Legacy777

    Moderator

  • Moderator
  • 12,654 posts
  • Houston, Tx

Posted 22 December 2004 - 09:51 PM

The normally aspirated legacies came with an atmospheric pressure sensor to compensate for altitude changes. The sensor is in the ECU, and can not be changed.

Just curious, why do you want to modify this?

The stock sensor won't output exactly at 760 mmHG, simply because of the reference voltage can vary. In Houston, which is essentially sea level, my barometric sensor reads 752 mmHG

#4 gsheng

gsheng

    New User

  • Members
  • Pip
  • 5 posts
  • atlanta

Posted 24 December 2004 - 08:58 PM

Thank you for your kind help. as for MorganM's suggestion, actually I read the trouble code ,the number is #45, atomospheric pressure sensor,and the engine light is keeping on. So I have a little worry on that. Also ,I appreciate legacy777's words , do you think I need not to care that too much?
Happy new year!
best wishes
guoqing




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users