Your
MAF voltage should run between 0 and 5V. At idle should be around 1V or less. The
MAF measures accurately how much air is going into the engine, so that the
ECU can determine exactly how much fuel to inject (adjust injector pulsewidth) to maintain the air fuel ratio as set in your tune.
The reason that it will run ok with it disconnected is because there is a
MAF fail scenario configured in your tune. Whilst this scenario may have the car running ok, it is far from ideal and I would not recommend it as your engine could sound ok, but in reality could be running dangerously lean - and you would never know.
My recommendation if you believe you have isolated it to the
MAF, would be to go and get some
MAF cleaner. If you
MAF can be disassembled, pull it apart to give a good clean with
MAF Cleaner.
Interested to hear how you go with this as there seems to be a fair trend at the moment for dirty MAFs, including my own! I recently cleaned my
MAF and corrected a poor idle issue.
Cheers
Stu
__________________
2002 AU II LTD
5.6L 342ci T3 Short, AFR165 heads, Comp XE270HR-12 Cam, Brembo 4/4s(355/330), T3 5 spokes, LC-1 wideband, Whiteline HD swaybars, TCE 3K Hi Stall, PWR Auto Trans Cooler, Koni shocks, King Low Springs, Hurricane headers, 100 cpsi cats, Twin 2.5" exhaust.
Quarter Mile: 13.73 @ 105.86mph
Runner Up NA/DA to BF Fairlane/LTD Geelong AFD 2024
2002 XR8 pursuit 250
Custom twin 2.5" exhaust w Herrod modifed extractors, Tuned with Moates QH