Using Lexus AFM on stock 7MGTE?

[7mx63]

I'm thinking about doing that whole Lexus AFM/Injector thing, but I'm curious if throwing the AFM on by itself (Without doing the injectors or tuning) will be beneficial or detrimental.

If I snagged one off eBay or a friend, should I throw it on right away or just wait until I get everything?

Motor is stock and completely rebuilt including turbo, 3" turbo back and a K&N intake.

Thanks guys.

 

[mk3-4-me]

ya i wanna know to, cause my afm just died on me. I still have the 440's and i wanna know if i should buy a Lexus or a stock. Eventually im gunna get some 550's or bigger so ill need the Lexus anyways.

 

[jetjock]

Just buy the lex and use its sensor in the stock housing until you're ready to upgrade.

 

[mk3-4-me]

Idk if you were talkin to the OP, but my sensor is not within spec, thus not workin. So will be fine if I use a lexus afm with it's sensor?

 

[jetjock]

I'd have thought since I didn't answer his question the reply would be interpreted at being directed towards you but I guess not. Anyway, read it again...

 

[4U2QUIK]

for those that are clueless, the sensor on both afm's are the same. The housing from the lexus is 25% larger which would allow 25% more air which is very bad. It will lean out your engine and you'll have a blown motor in no time.

 

[mk3-4-me]

Ok well I'll just put the sensor that's in the lexus afm in my stock housing until I get injectors I guess.. Thx

 

[jetjock]

There ya go.

And just so you know nearly all the Karman sensors I've tested that were claimed to be "out of spec" had nothing wrong with them. Either the person measured the IAT portion or, when testing the Karman portion, failed to account for meter polarity like the TSRM specifies.

 

[mk3-4-me]

I did test it Like it says in tsrm. My car has a code 31. And when I tested the ohms of the 2 prongs that we are supposed to check, it's supposed to be 2,000 - 3,000 ohms, and mine read 6.4.

So I'm pretty sure,with at least my problem, Its out of spec.

 

[jetjock]

Code 31 does indicate a problem but it doesn't mean the AFM is bad.

Which two prongs? Can you link to the page?

 

[mk3-4-me]

http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?Section=FI&P=96 there it is

 

[jetjock]

As I suspected. That's the air temperature sensor. Has nothing to do with airflow or code 31. Since you have 31 though the airflow sensor itself could still be bad. Or maybe not...