Tuner on Mass Air Flow Sensor?

MVP9182 · August 5, 2016

So while I cleaning up the engine compartment on my truck, I pulled off the cold air intake to clean the filter and polish the tube and I noticed this little box wired into the mass air flow sensor. The previous owner probably put it on but never said anything about it when I bought it. I thought tuners were usually just plugged into the ECU port in the cab? So what is this?

SouthernSilveradoGuy85 · August 6, 2016

It looks like one of those gimmicky type products that doesn't do anything. If you're able to just take it off then take it off.

kstruckcountry · August 6, 2016

110% garbage, I'd take it off.

Daryl LBZ · August 6, 2016

Junk. Throw it away.

txab · August 6, 2016

What is it? POS

MVP9182 · August 6, 2016

I looked it up and after some digging, you can buy a brand new one for a whole $14.99... it's definitely coming off. But since it's spliced into the wires for the sensor, do I have to replace the sensor or just cut it out?

sdeeter19555 · August 6, 2016

I would just cut it out, then solder the leads back together with some good heat shrink.

Since it only has two wires, it's probably a resistor in the box, used to fool the ECM by modifying the readings it sees from the MAF sensor...they use tricks like this in a feeble attempt at more power, more mileage, or some other ridiculous claim. These were common in the diesel world (in other applications besides the MAF).

Once you pull it out and verify it has no effect on the truck, cut it open and report back what's inside.

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MVP9182 · August 6, 2016

I took the 2 seconds this morning to cut it out of the pig tail. Some one had used scotchloks to attach it so I didn't bother with soldering it back together. After taking it off I opened it up and found that it was complete junk! I tried to take out the resin block inside and actually saw in the light that it was seriously just the resin with 2 leads suck in there. There was nothing burried inside of it. No green board, no resistors, nothing!

sdeeter19555 · August 7, 2016

Now that funny right there!

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SouthernSilveradoGuy85 · August 7, 2016

I took the 2 seconds this morning to cut it out of the pig tail. Some one had used scotchloks to attach it so I didn't bother with soldering it back together. After taking it off I opened it up and found that it was complete junk! I tried to take out the resin block inside and actually saw in the light that it was seriously just the resin with 2 leads suck in there. There was nothing burried inside of it. No green board, no resistors, nothing!

20160806_092509.jpg

I figured it would at least be a dummy circuit board to at least try to fool you. Wasn't expecting it to literally be nothing in there.