check engine light codes 31 and 24, car wont rev and floods! help! with video.
 

ive been messin with this car for two days, tried another used maf and nothing. doesnt even change when unplugged. if anyone has any ideas thatd be great, thanks in advanced!

ive checked and found all vacuum leaks no boost leaks no intake leaks.

1989 supra 5spd trans

http://s136.photobucket.com/albums/q...MDU5LjNncA.mp4

the video is holding the throttle about 1/4 down. any more and it just floods like crazy and backfires and pops out of the intake.

I haven't actually done a "boost leak test" but I've closely looked at all of the piping. Also if I unhook the bov it blows boost out no problem so i know its getting boost..

people from utah sure love parking their trucks ontop of stuff.
you sure its a 24?

I'm guessing you went through the Photobucket. Hahaha

I believe it was intake air temp sensor and maf.

yea i checked your photos out.. I want a rabbit man. those suckers are peppy..

I only have a couple of suggestions. as for code 24.. I don't know man.
but im experiencing the AFM code also. what I did was go out and get one from a junk yard off of a lexus ls 400. the electronics are interchangeable.
that solved my problem but it recently came back.. so I went back and bought the clip and wires for it too. Just got it today and haven't put it on yet. So besides that suggestion I would also consider instead of replacing the afm and wires to test it and see exactly which pin is causing the problem. then replace as necessary

I just got it sat in a garage for 15 years.

I went and looked in every junk yard for one and couldn't find one. I tore apart the harness and looked for bad wires and didn't find jack.
I added a new ground from head to the body just incase, i reset the battery and started it a few times to get it to idel, I noticed that it won't rev up at all until the engine light comes on. After the light comes on it does what is in the first vid. I'm posting a second one of what it does till the light kicks on.

Also, could you please explain to me on how to check the wiring and maf? I looked on google for forever but didn't find anything.

You're not going to find a lot of accurate info if you search MAF... No Supra ever used a MAF.

KVAFM diagnostics: http://www.cygnusx1.net/Supra/Librar...ection=FI&P=96

http://i136.photobucket.com/albums/q.../VIDEO0063.mp4

I forgot to mention I have a safc2.


I'll look it up to. Do you have any idea on my problem? also how would I go about testing the wires to the sensor? It seems like every post I find on here your a very big help to them! Thanks.
:dunno:

I think I already have the Lexus afm housing?

http://i136.photobucket.com/albums/q...A3NzcuanBn.jpg

I tested the two far right prongs and I have no resistance?

just drove all the way to my friends and grabbed his lexus afm, still the EXACT same thing.. i know now that mine isnt the lexus but idk what to do now! :mad:

Heh, don't tell my wife I'm on here.... I've been trying to spend less time volunteering on forums these days. ;)

The SAFCII may account for a code 31 (and possibly the code 24 depending on how it's wired.... I can't recall if it intercepts the intake temp sensor wiring or not) without anything actually being broken. It (like other more complex piggy backs) has a small initialization period during which it interrupts the AFM's KS (and possibly THA) signal(s). Under this circumstance the error codes won't affect performance, they were recorded and the event ended right after the engine was started. **Actually, the SAFC II doesn't intercept the IAT so it's out as a likely cause for the code 24.

Well, unless you're using the wrong settings on your multi meter, the IAT portion is broken (the E2 and THA pins). Did you try measuring your friend's AFM per the manual so you know what to expect from a good meter?

Who installed and setup the SAFC II? Are you confident it is properly set up? Unless you're running some significant mods the fuel trims shouldn't be too far from zero in the fuel tables. Check your system settings against those in the writeup here: http://mkiiisupra.net/bbs/showthread...ght=guide+safc As long as you're not running large injectors on the stock AFM or other mods such as increased fuel pressure you can also try unplugging the SAFC II and reconnecting the two ends of the KS wire (should be the only one that was actually CUT) to eliminate it as a suspect... I recommend doing so if possible and while you're at it thoroughly inspect the wiring harness where it's been altered/tapped.

Is this a new problem? If so what has been worked on recently? Codes 31 and 24 are the only diagnostic codes you're getting?

PI actually bought the car like this.. he said the upper belt wore a hole in the top hose and sprayed coolant everywhere and he slowly got it home by letting it cool then driving and so on, said it ran great all the way home then went out the next morning and boom, runs like crap. So that's why he figured afm cause it has a horrible steel cone filter on it and thought it sucked coolant into the afm?

Well, the KVAFM is an optical metering system. While it's sealed to prevent damage some moisture seeping in can fog the optics and render the sensor useless... It would take a lot to soak it to the point that the temp sensor would degrade beyond providing any signal though.

So did you actually try your friend's AFM in your car?

Well I tested the green and red wire and it was bad (the one that the safc2)

What? I don't follow...