armybombtech

I recently installed a new air intake on my 2001 Tundra. It was an Ebay special (no instructions), but the installation seemed to go well. One good rev' over 3000rpm, and that was it for the air sensor (positioned into intake tube). I put the stock intake back on, and replaced the sensor. Should I scrap the intake or try again?

The motor is the 4.7 V8. How do you "reset" the computer?

jimbo74

did you reset the computer after the intake an allow it to recalibrate itself for the increased airflow?

rimpainter.com

Please define or post a picture of this "air sensor."

jimbo74

i read it as refering to the maf, and although i have never heard of blowing a maf, i wonder if internally it got shockloaded and tripped out... however, if that were the case, seems like it would be the computer.. not a sensor that went bad, unless he broke the element or somehting during hte install

rimpainter.com

Yeah that's what I am wondering too. And, he did not mention which motor he has (not like it really matters that much) but it would be nice to know.

armybombtech

I have the 4.7 V8. It's the air sensor that plugs into the intake tube (Hitachi). I didn't "reset" my computer. How do you do that?

rimpainter.com

How do you know the MAFS was bad - for sure?

jimbo74

you disconnect the negative battery lead for half an hour... then wehn you reconnect it, let it ide for awhile then go drive it with varying degrees of throttle

armybombtech

The truck would drive fine up to 3000rpm, so I "limped" it back to the dealer. I played stupid, and they told me that the sensor was bad.

playswithfire

Hey Armybombtech:

Don't know what your ebay intake looks like, but I imagine it came with a gauze cone-type air filter. If so, here's what probably happened: the filter had too much oil on it, some of the oil got sucked into the sensor, then the sensor couldn't do its job and the motor ran like crap. People with aftermarket K&N filters have had similiar experiences. The dealer diagnosed it quickly as a bad sensor without bothering to clean it.

If you like the looks, sound or performance or the new intake, I would keep it. Just learn how to clean your sensor (search Yotatech), and you should be able to fix it if it happens again. IMHO only, so good luck.

motorhead99

if your check engine light came on you need to flash your PCM if not it may take 2 to 3 cycles.. a couple of days.. for it to reset.

rock on,
matt

lybones

I'm having the same problem. Got a obd II reading which shows MAF circuit low input. Cleaned MAF with contact spray cleaner same problem. Truck pulls real strong, but almost cuts at 3000rpm. still investigating.

MTL_4runner

There are some cases where cleaning the MAF does not fix the problem and it requires replacement (you can also check with the boneyard for a used one at a reduced price).