help!hehelp!running extremly lean at w/open trottle 14.1 a/f

celicagt4 · Post by **celicagt4** » Thu Apr 09, 2009 8:18 am

anyone having problems with map sensor reading at idle 8.9psi.and cranking reads 15.8psi.test another map sensor and still the same problem,when the veh is cold starts just fine,when is hot normal temp 195F won't start cranks fine i test the s300 and check all the wiring nothing is loose.

any sugestions?

Martian · Post by **Martian** » Thu Apr 09, 2009 9:03 am

post a datalog, calabration, and more details. What MAP sensor, injectors ect.

celicagt4 · Post by **celicagt4** » Thu Apr 09, 2009 9:14 am

Martian wrote:post a datalog, calabration, and more details. What MAP sensor, injectors ect.

is a aem 3.5bar and i test a aem 5bar and the problem still there.what details do you need?

Martian · Post by **Martian** » Thu Apr 09, 2009 9:29 am

Did you input the offset into your calabration?

celicagt4 · Post by **celicagt4** » Thu Apr 09, 2009 10:50 am

Martian wrote:Did you input the offset into your calabration?

yes i did

celicagt4 · Post by **celicagt4** » Fri Apr 10, 2009 7:49 am

check d17,d21 and d19 all ok any sugestions please

celicagt4 · Post by **celicagt4** » Fri Apr 10, 2009 11:03 am

still waiting?

crucian · Post by **crucian** » Sat Apr 11, 2009 11:45 am

Map sensor wiring not correct. Post what year car you have and the color of your wiring harness so that we can make sure that it's wired right.

celicagt4 · Post by **celicagt4** » Sat Apr 11, 2009 12:09 pm

crucian wrote:Map sensor wiring not correct. Post what year car you have and the color of your wiring harness so that we can make sure that it's wired right.

the car was running perfect for 1 year,wnt to the dyno fine no issues,next day went to start and that's when all this things start to happen.i even install the factory map sensor with the factory settings and still reading like 8 to 9 psi at idle and 15psi when cranking,not only that when the engine rich over 175f and i turn the engine off won't start i have to trow some carb cleaner to the trottle body and the engine start running fine and then start to misfire.is wierd the car was running just perfect for so long and strt to do all this things.evrething strtt when i remove the wire from the alternator to the fuse box and install the wire in the pos side in the batt for the kill switch.i realy don't think that's the problem beacause i reinstall evrithing the way it was.the veh is a 95 civic coupe and the engine harness i a 98 gsr the wires colors in the map sensor connector are green/white,yellow/red,red/green.i call hondata and they said install factory map sensor wih the factory settings if the car still doing the same thing is harness issue.in the low cam table you can see the reading in -17 to -19 at idle but when you go and check the desplay or sensors reading the map is at 8.5 psi.the car have a 3.5 aem map sensor regulated to 35psiby eboost2 boost controler..any help will be apreciated.,...

crucian · Post by **crucian** » Sun Apr 12, 2009 12:43 am

Measure the voltage coming from the signal wire of the MAP sensor when the car is in the ON position engine not running.

celicagt4 · Post by **celicagt4** » Sun Apr 12, 2009 4:09 pm

crucian wrote:Measure the voltage coming from the signal wire of the MAP sensor when the car is in the ON position engine not running.

i have 1.78v with 5bar map sensor and 2.89v with the factory map