Jump to content
Nburns

2jz idle

Recommended Posts

Hi, have just started up my 2jz gte for the first time and it will jump straight up to 4000 rpm ( rpm limit ) and wont idle at set 1000 rpm. Using 6 wire stepper motor.

Cheers

Share this post


Link to post
Share on other sites

It sounds like you getting a lot of air in after the throttle plate.  Look at the mechanicals first as the only time I've seen something similar was when someone had fitted a greddy intake to an SR20 and never blocked the spare ports.

Share this post


Link to post
Share on other sites

Actually I know for sure (at least on the JDM 2JZ's that we see down here in NZ) the stepper can bypass enough air to get over 4000RPM, so I wouldnt yet rule out that it could be IAC settings.  If you are using closed loop, switch to open loop and play around (or zero out) with base position table to see if it has any effect.  On some 2JZ you have to set motor direction to reversed.

Set all the step tables to zero - AC step, startup step, power steer, park/neutral, etc.  I have reported to link a few months ago that some of these "adjustment steps" invoke by themselves without even a DI assigned to them so there may be some odd bugs in this feature.

Share this post


Link to post
Share on other sites

Turns out the throttle body ( GM 102mm electronic) wants to sit at 22%. It looks like 22% is it neutral point.   

When you say electronic do you mean an e-throttle body? If yes then this will do your idle control and the stepper motor will not be required. Once properly setup an E-throttle body should be able to be controlled from 0 to 100% opening.

Scott

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...

×
×
  • Create New...