My boost gauge and the map reading from the sensor is a little awkward.

The map reading doesnt read higher then 12psi. But my mechanical boost gauge is showing up to 14-15psi. They both read the same psi as it climbs, had a passenger check them both to see if they are both reading the same -12inhg to 12psi, but after that the map sensor just stops reading while the boost gauge is still climbing.

I look at the datalog and you can see the map sensor reading climbs, then just goes flat once it reaches around 12psi.

I though the map sensor max range was 16psi? Is it my map sensor?

 

Do you have a FCD installed?

 

None that i know of

 

Its a 2 bar map sensor so it reads +/- 1 bar, it should read up to 14.7 psi.

Cracked vacuum lines?

 

I had that happen to me . I also have an Apexi ebc wich is consistant with my gauge but not with my factory map. Is the factory sensor that far off??

 

+1

I see 11-13 on the Gauge, but like ~9-11 on the ecu.?....

 

what is the source of the vaccume line. is it the ones behind the throtle body? which ones are you using. are you using Ts.

maybe the map sensor is bad. use the FSM and run a check on your map sensors.

what about the sensor itself, is it an n/a sensor or tii.

how is the wire harness. are you getting full volts/readings in the line all the way to the ecu.

idk, this is why i am asking, to ask yourself. stock harness can have issues in it, bad connectors weak signals.

just a thought.

 

Ill try changing the main vac line, right now its the nipple near the acv, but I have that blocked off. My boost gauge is run off of that same line. I replaced all vacuum lines with new ones. Its a 370 map sensor so its the right series for the ecu. I was going to check the map sensor last weekend, but I had to change my cousins valve seal in his civic, so I will check that this weekend.

 

Ok, question for all of you...

If you have the car OFF, and turn ignition ON, then check the MAP sensor reading on your Palm... does it read 0 ???

Mine reads 1.3 inHg with ignition ON and car OFF. I tried different MAP sensors and they ALL read the same value, so there is no way the sensor itself is wrong. Now I'm checking the voltages at the sensor and ECU, and the power voltage to the sensor. Also, when I compare the boost gauge reading with the ECU reading, the values are ALWAYS off by about that 1.3 value... at least during vacum conditions.