Have you ever experienced this?

chikinhed · #1 (**permalink**) 12-31-2007, 11:08 PM

I had installed an AEM air/fuel ratio gauge and power on (low current draw) for a relay that turns on the after cooler pump and fan. I connected them to a terminal strip under the fuse box which provided ignition power on (red/white wires). This caused the DME to give throttle position sensor and/or mass air flow codes. I had also tried to hook these up to ignition on (green/white wires) which had then caused rough running. Is BMW wiring that sensitive to minor current draws? Any techs out there?

bmw95318is · #2 (**permalink**) 01-01-2008, 09:01 AM

well what are the specific codes you are getting with the maf and how different is the maf located when you have the setup on compared to stock, did they like include software cause its a little different or what. need some info and also what voltages are you getting with tps sensor when at wot and idle?

itsabimmerthing · #3 (**permalink**) 01-28-2008, 06:37 PM

Is it the spectrum gauge? The one with the lights? If so these are hardly accurate anyhow, they are narrow band and are really only good for a light show. I would go to a 02 wideband, which is FAAAAR superior to a narrow band, and I wouldnt trust a forced-fed motor to a narrowband.