n16ht5

I just put a 1989 Mazda MX6 2.2L AFM into my 90 22RE. Its the same size as a.... 1982 Supra .

Sadly, it doesn't have the 3" inlet for a cone filter, but it still does the job. Its a direct plug and not play, just need an adaptor for the intake pipe size difference. The diameter is the same size as my supra afm, and the air box has a nice round port on the intake for running a snorkel.

Ill post some pics in a minute....

$20 at the pull yard, found a rubber adaptor to fit it even.

EDIT - after a few days I got an intermittent code from it... seems to run fine, but I'll throw my stock circuit board in it. Oh well, it only takes 10 minutes. It came off a non-turbo car so idk? I didn't test it thoroughly I guess.

n16ht5

MudHippy

Really? They all "plug" you know? It's the "play" part you need to be concerned with. How were you able to verify the pinouts and voltages were the same? Size isn't the only issue with these things. If they don't match up you could end up frying your ECU.

Did you just take a leap of faith? Possibly off a very high bridge?

n16ht5

You wont fry your ecu if its not the exact one. It" plays" just fine. Its the only mazda one I found that reads the same so far though.

n16ht5

You wont fry your ecu if its not the exact one. It" plays" just fine. Its the only mazda one I found that reads the same so far though.

MudHippy

No, you're not listening. I didn't say "will", I said "could". Big difference. And yes, you CAN fry your ECU if the pinouts and voltage requirements aren't EXACTLY the same.

Is that a pic that I'm supposed to be seeing? Because all I see is

n16ht5

I was trying show a pic of my fluke meter. I just went around the pull yard looking for one that would work. I didn't know you could fry your ecu, I guess its a good thing I didn't try plugging them all in to see, I checked out about 5 different ones there lol

xxxtreme22r

when you tested how did you test it?

hunter4runner

I'm guess he tested resistances

MudHippy

Yeah, that and/or continuity would be all you could test. I may have mispoke about the voltage requirement being an issue, but I'm not at all too sure how they might differ in that respect. Being that the donor VAFM isn't from another Toyota. I know Toyota uses two styles of VAFMs, some are 10V and some are 5V. I also know that if the pinouts aren't the same that could definitely cause some issues, 10V or 5V. I believe the VAFM on the 22RE is a 10V(according to the FSM).

So, if it were a 5V VAFM and you tried to put it in a 10V system you could potentially damage the circuits in the VAFM even if the pinouts were the same, and/or the ECU if the pinouts weren't the same. Not the other way around though. Putting a 10V VAFM in a 5V system would probably just cause a DTC or 2 if the pinouts weren't the same, or even if the pinouts were the same. However, the pinouts on a 10V and 5V Toyota VAFM will always be different. So just making sure you're using one with the same voltage requirement as the one it's replacing will minimize the chance of anything catastrophic occuring should the pinouts not match exactly. Atleast that's how I understand it.

Of course I could be totally wrong all together. But I'm not sure I am. Enough so that I'd be very apprehensive about trying and fit a VAFM to a vehicle that I wasn't sure had the same pinout as the one that was in there to begin with. In case it's not plainly obvious, electrical circuits and wiring aren't my strong suit. So pushing my luck, by pretending I'd have a clue whether it'd do any damage or not, isn't something I'd feel comfortable doing.

Most of what I've gathered about the two styles of VAFMs that Toyota uses comes from pages 6 & 7 of this pdf: http://autoshop101.com/forms/h24.pdf

myyota

So was your AFM bad and you needed a replacement ?, im not understanding why you swapped it out. You would have been better off looking for the larger AFM from a supra or cressida (P# 22250-43110), you would of had some noticable gains with it, and possibly gained a little better gas mileage.

xxxtreme22r

Oh I know how to test em but does he? that's why I asked.
Just because the plugs plug in doesn't mean it's right.

Only plugs that are universal that I can think of off the top of my head is the obdii ports.

Swimmerboy2112

iTrader: (2)

X2 i did this upgrade and what a difference it made!

MudHippy

What are you two talking about? He said it was the same size as a 1982 Supra. Part # 22250-43110 is for a 1982 Supra.
http://www.autoairflowsensors.com/ca...productid=3543
Maybe they didn't have any 1982 Supras where he went. I'd assume that's why he got the one from the MX6 that's the same size. Make sense?

myyota

Post the part number, or a picture that shows the part number and the year and model mazda that you got the AFM, this would be another option for those looking to do an AFM swap. You can buy the adaptor to add a cone filter off of ebay

MudHippy

Oh shoot! I hadn't thought about that. I can find the part # for it on the same site I found the other one. Sorry, caught me slippin'.

Here ya go!

http://www.autoairflowsensors.com/ca...electyear=1989

With turbo? That worries me a little. I thought I'd heard you shouldn't use the turbo types on a non-turbo engine. I believe it's been done before, but I think I remember reading that he had to swap his old VAFM electronics into the turbo VAFM.

Something about the potentiometer being different between the two. It might work, but the fuelling curve isn't gonna be right. Or whatever you'd call it. Basically the signal doesn't change at the same rate based on the measured air flow, thus the fuelling will be slightly off accordingly. So it'd be telling the ECU to give you too much fuel, or too little fuel, too soon or too late. If that makes any sense. I don't know how to explain it any better. But, it's no stretch of the imagination to figure that the fuelling needs of an NA motor don't necessarily match those of an FI motor(especially if they're the same displacement).

EDIT: I guess there's two 2.2L engines for the Mazda MX6. The F2 and F2T. DX, LX, and LE have the F2, GT have the F2T. So they might not use the same VAFM, but that's all that site has listed for 2.2L MX6s.

RE-EDIT: Then again, maybe they do all use the same VAFM? That's strange....
http://www.autohausaz.com/search/pro...Air Flow Meter

Well...that's all I've got! Good luck figuring this one out. I'm just glad I don't have a 22RE, so I needn't worry about it.

InvaderTrax

So you used the Mazda airbox too? Or does it fit the stock airbox?