EVOthis Posted March 23, 2008 Share Posted March 23, 2008 alright guys......ive got a 1996 subaru legacy L EJ22 with a 5 Spd.........i could be mistaken but i thought that the MAP sensor and pressure exchange solenoid only came on the automatics and turbocharged models?.....i have a 5 spd non turbo and i have both of them mounted on the passanger side shock tower........what am i missing here......its the origonal engine and trans so nothing was taken off or swapped or anything........... Link to comment Share on other sites More sharing options...
nipper Posted March 23, 2008 Share Posted March 23, 2008 Your mistaken. Every car engine with OBD II (and OBD I)has some sort of MAP sensor set up, either like subarus, or a combintaion sensor. How else does the car know its alitiude, it can't look over a cliff nipper Link to comment Share on other sites More sharing options...
EVOthis Posted March 23, 2008 Author Share Posted March 23, 2008 ok....i see.......i have heard that some manufacturers only use the map sensor for diagnostic purposes.....is this what they are referring to...altitude......thanks for clearing that up for me nipper ( i guess the haynes manual is wrong than) Link to comment Share on other sites More sharing options...
nipper Posted March 23, 2008 Share Posted March 23, 2008 MAP is Manifold Absolute Pressure. SUbaru just cheats (rather brilliantly) and uses it for both the manifold pressure (vacume) and atmospheric pressure. nipper Link to comment Share on other sites More sharing options...
EVOthis Posted March 23, 2008 Author Share Posted March 23, 2008 ah....ok i understand.......thanks nipper Link to comment Share on other sites More sharing options...
86subaru Posted March 23, 2008 Share Posted March 23, 2008 i am still getting the barometic pressure switch code, i put a used one in , cleared all codes drove it all week , Link to comment Share on other sites More sharing options...
nipper Posted March 23, 2008 Share Posted March 23, 2008 i am still getting the barometic pressure switch code, i put a used one in , cleared all codes drove it all week , There are chances the used one may be bad. Also check the vacum lines for any damage. nipper Link to comment Share on other sites More sharing options...
86subaru Posted March 23, 2008 Share Posted March 23, 2008 ok, i check the hoses and they are good, from the map there are 2 lines a short 1 and and long one, could these be crossed, going to another sensor, Link to comment Share on other sites More sharing options...
EVOthis Posted March 24, 2008 Author Share Posted March 24, 2008 i thought at one time i priced a new MAP sensor for my 96' legacy and it came up to like $350 from NAPA.....i could def. see why you would get a used one..... Link to comment Share on other sites More sharing options...
86subaru Posted March 24, 2008 Share Posted March 24, 2008 would this really affect mpg ? it's the only code left Link to comment Share on other sites More sharing options...
nipper Posted March 24, 2008 Share Posted March 24, 2008 would this really affect mpg ? it's the only code left Yes, it tells the computer how much load the engine is under. The higher the load (lets say going up a hill or passing) the lower the vaccum. Its very imporatnt. nipper Link to comment Share on other sites More sharing options...
86subaru Posted March 24, 2008 Share Posted March 24, 2008 ok thanks Link to comment Share on other sites More sharing options...
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