Mass air flow sensor need replacing but am having trouble sourcing one.

[Shea]

1992 fj80 with 235k and been getting horrible (6mpg) gas milage and really lacking power.
Apparently the maf is not working as it should and needs a replacing; Talked to yota tech and sound like its past point of cleaning.
The question is I can find used for $200 or an A1 Cardone re-man for a little less. Re-man seems the better bet but wanted to get some info.
Also would prefer to buy from shop local instead of online but cant seem to locate one in the Los Angeles area. Any recommendations would help

 

[DSRTRDR]

contact arcteryx here on MUD for used parts - also known as CruiserYard: Toyota Land Cruiser Used Auto Parts Accessories | CruiserYard | Austin, Texas

 

[Shea]

contact arcteryx here on MUD for used parts - also known as CruiserYard: Toyota Land Cruiser Used Auto Parts Accessories | CruiserYard | Austin, Texas

Awsome, Thanks a ton!
Just out of curiosity, is there going to be a diffrence between original used vs a reman part from A1 cardone?

 

[Mudder]

The quality of work will probably not be the same. And the whatever they replaced when fixing it would not be the same quality as a used Toyota one.

 

[Shea]

The quality of work will probably not be the same. And the whatever they replaced when fixing it would not be the same quality as a used Toyota one.

Very true... another question then, whats to say a used one used part vs another used part being "reliable". Does some one hook it up to volt meter and inspect or is it more of a pick up and rattle to make sure nothing rattles and throw it on to the interweb?

 

[LINUS]

Here's a shameless plug:

Joey / @NLXTACY /wit's end.

You ::could:: move up to a Landtank one if you have any designs on making improvements like a S/C - or even a N/A setup I think I remember it made a small improvement, esp come tailpipe test time.

Trouble with used electrical parts is the "no refund" policy - you catch a dud & any money you save comparing prices just is flushed down the drain.

 

[mct75]

A 3FE doesn't have a mass air flow sensor. Make sure if you get a replacement it is for the right motor.

 

[Shea]

A 3FE doesn't have a mass air flow sensor. Make sure if you get a replacement it is for the right motor.

You are corect
Vaf 22250-61010

 

[jonheld]

You are corect
Vaf 22250-61010

Toyota calls it an air flow meter (AFM) in parts lookup, in the factory service manual, and in the electronic wiring diagram manual. It's an AFM for the 3FE engine and the same part number is used for both the FJ62 3FE and the FJ80 3FE.

They rarely fail unless they have been molested by either removing the 2 phillips screws on the connector housing that hold the internal circuit board in place, or by cutting the plastic top off to adjust the internal spring tension on the door flap.

There is an AFM testing procedure called out in the FSM.

The modified one that Joey sells is not for the 3FE motor. It is for the 2nd generation (OBD2) 1FZ-FE.

I would test the one you have according to the FSM and if it tests faulty replace it with a used one from Jason@cruiseryard.com @arcteryx.

 

[jonheld]

Also keep in mind that these trucks are now 25 years old and even when they were new, most Toyota mechanics had little to no experience with them. Unless your mechanic is experienced with Land Cruisers, I wouldn't put any faith in his diagnosis. You're dealing with 1986 technology here.

 

[Shea]

Toyota calls it an air flow meter (AFM) in parts lookup, in the factory service manual, and in the electronic wiring diagram manual. It's an AFM for the 3FE engine and the same part number is used for both the FJ62 3FE and the FJ80 3FE.

They rarely fail unless they have been molested by either removing the 2 phillips screws on the connector housing that hold the internal circuit board in place, or by cutting the plastic top off to adjust the internal spring tension on the door flap.

There is an AFM testing procedure called out in the FSM.

The modified one that Joey sells is not for the 3FE motor. It is for the 2nd generation (OBD2) 1FZ-FE.

I would test the one you have according to the FSM and if it tests faulty replace it with a used one from Jason@cruiseryard.com @arcteryx.

Thanks for the help! Yeah i figured the landtank was the torpedo style for the fzj80.
Did some looking around and found some on ebay but decided to go with one from cruiser yard. It was a couple bucks more and have to pay for shipping but would rather it go to a MUD'er than who knows where from e bay.

Brought the truck with original afm to a yoda tech and tested it and say its faulty. It sounds like some of the circuitry was screwy so he says.
Symptoms are lack of power thanturbo effect at around 2k rmp and really bad gas mileage.

 

[jonheld]

Symptoms are lack of power thanturbo effect at around 2k rmp and really bad gas mileage.

That SCREAMS EGR/vacuum modulator to me. The 2 flying saucer guys mounted on the left side of the intake. They have internal diaphragms that fail over time and clog up vacuum lines.

 

[Shea]

Also keep in mind that these trucks are now 25 years old and even when they were new, most Toyota mechanics had little to no experience with them. Unless your mechanic is experienced with Land Cruisers, I wouldn't put any faith in his diagnosis. You're dealing with 1986 technology here.

Definitely understand. He is an independent toyota macanic, usually a couple tlc in the yard getting work done. Thanks a ton

 

[jonheld]

You should read through this thread as well:
General 3FE Tune Up Info

 

[Shea]

You should read through this thread as well:
General 3FE Tune Up Info

Now this meter can not be cleaned like others because of the vane shape, is that correct?
And thanks for the thread recommendation.

 

[mct75]

There is nothing much to clean, it's just a flap that controls a (sealed) potentiometer. "Real" MAFs have a heated element that is subject to getting dirty.

 

[Shea]

There is nothing much to clean, it's just a flap that controls a (sealed) potentiometer. "Real" MAFs have a heated element that is subject to getting dirty.

Is it heard of to have the unit fail?
The mechanic seemed to be pretty positive it was the culprit.

 

[mct75]

There's a really easy test in the FSM, you just measure the resistance on some of the terminals. I would check this yourself before spending too much money.

And, as @jonheld said, never remove the two phillips screws in the unit.

 

[jonheld]

Is it heard of to have the unit fail?
The mechanic seemed to be pretty positive it was the culprit.

Don't guess. Test the unit.
The AFM contains 3 items. A switch for the fuel pump logic, a pot for the AFM flap, and an intake temperature sensor. The last 2 are inputs to the ECU for fuel management.

 

[Shea]

Don't guess. Test the unit.
The AFM contains 3 items. A switch for the fuel pump logic, a pot for the AFM flap, and an intake temperature sensor. The last 2 are inputs to the ECU for fuel management.

Hey thanks for the info! took a voltmeter to it and it not responding as it should till 2300 rmp or so then kicks in giving me the turbo launch effect.
Part should be here soon and getting a knuckel job done next week.