twenglish1
08-10-2023, 06:43 PM
Built a 5.3l I will be installing into an 84 camaro, engine is still on the stand I installed the harness and had been working though some initial configuration and circuit checks for the various sensors, I can't seem to get any response from the maf or o2 sensors, are these only active when an RPM signal is present? I remember from the older obd1 vehicles you could ground the o2 signal wire with a test light to check the circuit, the wiring in the harness appears to be correct, but it was an aftermarket harness so have been questioning it. As for the maf sensor, I will be using one of the card style 5 wire maf sensors, I have an adapter harness to combine the 3 wire maf and 2 wires for IAT. Issue I'm having is IAT doesn't read correctly, 20 degrees high or so, even with maf side disconnected as i know the heater would affect this, and can't find any calibration for it in tunerpro or universal patcher. Also am getting no response from maf in logging software, unless engine needs to be running for this to work? Just was trying to confirm wiring was correct, as there was some mixed information I had read about these maf sensors