Need help with MAF - Toyota Nation Forum : Toyota Car and Truck Forums

Kyle Hamelin · 05-19-2011, 02:33 PM

Hey guys I have never cleaned the MAF senor before and have had the car pretty much since it was new (30'000km). Would someone have a picture showing where abouts this thing is? I'm not to familiar with the parts under the hood so I find pictures the best. Also what is the best way to clean it. Any help is awesome thanks!

pdq · 05-19-2011, 04:02 PM

Here you go. These are pictures of a Matrix, but it's the same 1ZZ-FE engine. The red box is the same as the Corolla's black air box. If you just want to clean the MAF, stop at the 4th picture -- the MAF is that wire inside the sensor tube.

For cleaning, you can get CRC Mass Air Flow Sensor Cleaner at most auto parts stores.

http://matrixowners.com/index.php/to...idepics-incld/

Kyle Hamelin · 05-19-2011, 06:43 PM

So to get the MAF out it is that black part that has the screw?

Also after you spray it how long does it need to dry before putting back in?

OHHHH I thought it was the one under the accelerator cable.... So its the part up by the air filter then?

pdq · 05-19-2011, 06:58 PM

Yeah, air box == air filter box.

The spray evaporates within 30 seconds, so once the MAF is clean, you're done.

Kyle Hamelin · 05-20-2011, 05:38 AM

Excellent thank you very much for this stuff. Very helpful I will be doing that this long weekend.

Just wondering though. Why do they say to disconnect the battery and the air filter line? Is their a potental to blow the MAF while plugging it back in or something?

pdq · 05-20-2011, 09:23 AM

Removing the battery ground cable is just a usual precaution when unplugging or plugging any electrical connections. It's definitely needed if you remove the alternator or air bag, for example.

If you're careful you can skip that.

fishexpo101 · 05-20-2011, 02:47 PM

Sometimes it is helpful to disconnect the battery after these sort of cleanings, as it will force the ECM to re-learn new parameters. Not a bad thing, if the MAF sensor was excessively dirty to start with. The ECM will re-learn new parameters without being cleared, but I find the car always seems to run better, re-learn faster if you start with a blank slate, so to speak.

Kyle Hamelin · 05-21-2011, 11:37 AM

Well I just did this and it was so easy. Again thanks for all the help here. Will this give you any better gas mileage? I think it's my is fine already but just curious

teppista881 · 05-21-2011, 01:01 PM

It won't appreciably raise gas mileage unless your mileage was already really suffering due to the dirty sensor.

Kyle Hamelin · 05-22-2011, 11:58 AM

Oh well it was worth a shot ha. Still nice to know that it's clean and working properly.

azncapcom · 06-01-2011, 07:48 AM

I dont think my local parts store has the CRC sensor cleaner. I've heard of people using brake cleaner? how safe is this?

Kyle Hamelin · 06-01-2011, 10:45 AM

I wouldn't use break cleaner.

I see you are from the GTA area. So go to a Canadian Tire and ask for their new MAF cleaner. They just started carrying cleaner that is made just to clean that.

After I cleaned the MAF with that stuff the car has been running great. It really makes a huge difference in the responce from the pedal to the engine.