Clean MAF with pictures - Gen3

[coffee-3000]

I have a Gen 3 Camry. I'm going to attempt to clean the MAF tonight.
A drawing of the MAF is attached. Is this the type of MAF that has an exposed wire(s) that can be sprayed with a cleaner ? I understand that there are two types of MAF's. One might be called an AFM that has some sort of flapper rather than wires. Thanks.

B60tw

[abew330]

create a account on photobucket.com upload pics then get the image code from there..

you trying to clean the maf sensor? get maf cleaner found locally at your auto parts store(autozone)

or are you trying to clean the connections(plug) to the maf? get QD electronic parts cleaner should also be found at a local auto parts store

[abew330]

http://www.autozone.com/autozone/cat...&brandName=CRC

[coffee-3000]

Thanks abew330. I took your advice and openned an account on photobucket.com. I also appreciate your advice on what to use to clean the 1996 Camry's MAF sensor. But I'm still concerned. I have attached a photo of the MAF. By looking at the photo, I'm not sure I can get at the wires that need cleaning. They seem to be encased in a hard plastic shell. Do you think I can spray the cleaner into the shell ?

The toyota part number is 22250-20020

[abew330]

have you taken off the "plug"? if theres bad connections you should be able to see it on the inside of the plug. either way just spray a little inside and behind the plug(once disconnected) then allow to dry and re-connect

also you should be able to get away with just a can of the electrical spray in the link above to clean the maf(arrorw in pic) and the "plug"

have you read / got any trouble codes?

[coffee-3000]

Thanks abew330. I'll try to spray the electical cleaner onto the pings within the plug and into the openning on the MAF Meter Assembly ( where the arrrow is pointing in the photo ). I'm getting the the common P0171 problem code with means the system is too lean. Most post on this forum advise to clean the MAF Sensor before looking other places.

But most posts on this forum describe a MAF Senor that appears to be different than the one on my 1996 V6 Camry ( Gen3). The MAF electrical connector appears to be plugged into the MAF Meter Assemby which can't be taken apart. It doesn't appear that I can get at the resistor looking things that most threads say to clean. Do you know if I'm seeing this correctly ?

Sorry for asking my question over and over.
I really do appreciate all your insight.

[coffee-3000]

I found some pictures on the MAF I plan on cleaning.
I'm going to attempt to spray the electrical contacts and inside the housing as abew330 suggested. The only thing that worries me is that I don't see the wires inside the housing. My research is showing that this MAF was only on the 94-96 V6 Camry ( as far as the Gen3 Camry is concerned ).
Has anyone had success cleaning this particular MAF ?

[CROYCE992]

do all Camrys have a MAF? does mine for example (see sig)? I had no idea that they needed cleaning, perhaps mine does.

[coffee-3000]

I just browsed the the Toyota Camry 5S-FE Engine Repair Manual for 1992 - 1996 and it did not show a MAF Sensor/Meter. I guess it is one less thing to worry about. It must only be on the 1MZ-FE engine.

[coffee-3000]

I plan on cleaning my MAF Meter next week. I'll post pictures at that time.
Has anyone cleaned this particular MAF before ? It doesn't appear that the sensor ( i.e. the resistor looking thing or hot wire ) can be separated from the assembly. Does anyone know if this is the case ? I understand that some can't be cleaned.

[coffee-3000]

I was able to remove the MAF Meter assemby and I was able to see the hot wire inside. There were no screws to remove the hot wire from the MAF Meter assembly. It's all one unit. Therefore I had to spray the MAF cleaner into the assembly. I really couldn't tell if the hot wire was dirty before I cleaned it. BUT. No success. I'm still getting the P0171 trouble code.
This indicates that I have a "lean" condition ( which means I getting more air than gas ).

But I'm glad I tried. This seems to be what most people on this forum sugguest as step #1 to discover the issue. It still could be the MAF Meter that is causing my issue, but I'll look at some other things before I return to it.

But some good news. I cleaned the throttle body while I had the air intake off. WOW !. What I difference it makes. My 96 v6 Camry with 142K miles drives much much better. I had a sticky gas pedal before I cleaned the throttle body. It doesn't stick any more.

[73sport]

^^ As you found, it doesn't open, it doesn't disassemble. Its sealed for life. With an LED type flashlight you can see the wires through a tiny slot (just past the bullet shape cone). Mine were pretty clean but noticeably "furry" as in there was some build up on them and once cleaned, they were smaller and less furry.

All I can say is tip it and gently shake out all the cleaner as it has no real way out but evaporation and you don't want the old stuff drying right back on where you cleaned it from. Do it several times and try to get all the cleaner out.



That must have been one nasty T/B to have it unstick the gas peddle.

[Brandoe91]

I think someone already has a write for this...check the sticky area. It's at the top of the gen3/gen4 camry forums.

[coffee-3000]

Thanks 73Sport. Your comment is exactly what I saw. I had to pour the MAF cleaner out of the assembly after I sprayed the hot wire.

I'll try to clean the fuel injectors by adding Chevron Techron in my gas tank. This will be step #2 in the process to elimnate the P0171 trouble code.

[73sport]

Look at you IAC hoses right where they enter the intake manifold near the injector bases. Inspect that whole area for vacuum leaks. Also inspect the air clean hose for cracks. BEND it and twist it as the engine moves and they can crack over time.

If you could get the freeze frame data from a code reader that would help also. After that, reset the ECM and see what happens.

Techron is good stuff. Keep that up. But I suspect a vacuum leak. How's the idle speed?