codes displayed Intake Air Temp

[busybeezturbo]

My 89 turbo supra is displaying a Intake Air Temp code where is the sending unit and how do I fix it??

[Eye8Pussies]

for supras, you'll probably have more luck posting this question in the supra forum

[bgrieger]

IAT is hard built into the AFM electronics. If it has failed, and not just the wires are bad/harness is shot, replacement is the only option. Expensive option. Get a spare from someone close to you (If you know anyone else with one) and swap theirs in to see what happens.

Bob

[busybeezturbo]

where is that located at? ran test for codes came up with a MAF sensor signal,ao2 sensor signal,and the intake air temp.sensor signal. THE O2 and MAF are a piece of cake just dont know where to find intake air temp.sensor

[busybeezturbo]

by the way dont know anyone in this area (bayou country)that might have a supra does it have to be a turbo? I have 7mgte.

[bgrieger]

If you found the AFM, you found the Intake Air Temp sensor. It's built into the same electronics.

Yep. NA cars used a flapper door air flow meter, turbos got the KV AFM system.

Bob

[Jeeves]

You have to replace that whole electronic black box to replace the IAT.

[busybeezturbo]

thanks guys your help is greatly appreciated any Idea where I can buy one I went to napa today they couldnot locate one is that a dealer item do you know? and Thanks Again Guys

[Jeeves]

Find one of a wrecked car or someplace like car-parts.com, they're like $600 @ the dealer, and most places don't sell them.

[busybeezturbo]

OOWWCH!! $600 thanks for the info on that I will be sure to find one elsewhere than toyota is it the same MAF in a 7MGE as 7MGTE.I know where there is 1 supra looks like a junker but dont know if it is 7MGE or 7MGTE but I will try to find out tomorrow.

[busybeezturbo]

OK looked back in the posts and got the answer on that one I should have remembered I unsed to autocross a 7MGE 87 n/a supra w/flapper MAF sensor. Thanks again

[Jeeves]

Turbo's uses the Karman MAF method, N/A's used the flapper door method. The two are not interchangeable.

[busybeezturbo]

OK thanks for the info Jeeves.what are your views on the Lexas AFM? Cost and tuning? Is the tuning needed able to be done by a tinkerer(me) or a professional?

[Jeeves]

To install the Lexus AFM you need the following:

- Proper 550cc Injectors (and the injector clips, some come w/them others don't)
- Lexus AFM (Metal housing)
- AFM Electronics.

There seems to be mixed words as to whether the Lexus AFM Electronics work or not.

If you've got the proper parts. It's a drop in installation. If you don't have all the parts, it shouldn't be done at all. Just the AFM and you'll lean out the motor. Just the 550s and you'll over-fatten it.

For what it does, the Lexus AFM is great. However, Suprasport.com sells an SSAFM wich has a finer adjustment screw and such. I'd personally use it over the the Lexus casting.

Edit: In fact, they sell the whole thing as a kit: Here. You'll note no AFM electronics are included.