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I have the apexi PFC for my subaru EJ20G L-jetro based, I installed the boost controller kit (apexi Map sensor and solenoid 3 pin harness)
I have -286 mmhg or -11.2598 inhg of vacuum with engine OFF, boost control kit turned on
I have -583 mmhg or -22.9528 inhg of vacuum with engine ON, boost control kit turned on (on my gauge reads -12 inhg, Im pretty sure is not lying)
I have 0.30 kg/cm2 or 4.267 PSI when my gauge says 10 PSI of boost!!!, and it has similar readings with the original map sensor before installing the kit, TOTALLY INACCURATE!!!
I have to mention I live over 4060 meters over sea level or 13320.21 feet
so I dont have datalogit but I downloaded the software, I don't see any settings about map sensor pim scale or similar for my engine to fix this data
I tried another PFC ecu and had the same readings.
did someone fix this similar issue on L-jetro PFC's?
please help me!
I just was telling someone else this as well, but it sounds like you need to scale the map table. Also if the ecu has ambient pressure comp Id check that as well.
For the MAP I like to use a test gauge setup hooked to the sensor and a pressure regulator, then read the volts out as you increase pressure. you can tune the curve to suit and check for repeatability. Only need the key on for that test. also use a hand vacuum pump to pull below ambient pressure. That should get you pretty close .
