supra head gasket questions+ rebuild

[supramacist]

I'm Sorry man.

All you need to do to pull codes is turn the key without cranking on the engine. Using the jumper wire.

You can turn it if you like.

I just check that stuff before I even drag on the battery once these days.

The engines either going to go or not. By pulling the codes 1st you know what you're getting into
and if you should even crank on it.

Once you get the codes you can remove the negative battery terminal they say for a minute or so.

I like to give it a few..., like 15. I also unhook the entire battery to do this. But that's just me. This resets the the diagnostics. So you can retrieve codes again and know you aren't pulling the same ones.

EDIT: The 2nd pic says blowby to me with that black throttle body and butterfly valve.