I've pretty much read through all the threads possible about the 1JZ but haven't found my answer yet. Hope someone can shed some light for me. I just put in a Automatic 1JZ into my 97 SC400.

I have the problem that some people have in that when I connect the battery, the engine starts to crank. So I read that most people bypass this using a push button start. I purchased just a simple push button start from Kragen as a temporary solution. I was under the impression that this hooked up to the starter wire underneath the dash. What is wierd is that while testing everything, I had the whole ignition plug disconnected from the ignition, but if I connected the battery, it would still crank over.

So I ran the push start button from the relay wire in the engine. This worked and I can get the engine to start but when the engine starts, it starts to rev right away to redline. Am I connecting the push button wrong?

 

make sure ur throttle isnt stuck wide open maybe lol thats what i would check first or check the throttle cable