Can I put a Voltage Gauge on a Maf voltage wire?

[AnthonyR23]

Hi, so I just installed a quarterhorse and innovate wideband, it was my first day tuning. So I made some basic adjustments, like displacement, fuel injector slopes, injector offset vs battery voltage and started playing with the maf curve.

So this is great, and I am filming everything, using Clint's Software. What I would like to know is I have a voltage guage that I haven't hooked up yet and just wondering if I can hook up the maf sensor voltage output wire that goes to the computer to my voltage gauge so when I am tuning the maf curve I will know what the output voltage is. Thanks! I know I can probably do datalogging for this, but just wondering if hooking up a voltage gauge would hurt? Thanks!!

 

[90mustangGT]

I'd say so as long as the gauge isn't being powered by the wire it is reading such as an analog gauge. A digital should work fine.

 

[jrichker]

The MAF has 4 wires, A & B are the heater voltage and C & D are the MAF signal output. Due to the MAF output being a differential voltage, you have to measure the voltage between C & D and not between C and ground or D and ground . Some data capture systems are not set up to do that kind of measurements and will only measure a voltage referenced to ground.

 

[AnthonyR23]

I just used a multimeter instead of a gauge.... and it worked fine, ran the wires inside the car so I can see what's going on with the maf. So is it a good idea to tune the maf curve at different rpm points to get my desired a/f ratio of 14.7 to 1 before my emissions test. I was also thinking of putting a rev limiter on it. The emissions place I go too they just idle the car, not on a dyno, and idle for so long, then rev at a certain rpm for the second half.. If I talk to them and say they are supposed to rev at say 4000 for so many seconds, I can put the rev limiter on 4000, and tune the different free idling rpm points to 14.7 to 1. Then I would assume I would be good to go for my emissions tailpipe test. And I will make sure the car is warm for it too.. Will this work? Thanks

 

[strtrcr50]

As you said, you can datalog the mav voltage at the computer with bineditor.