Jump to content

Welcome to TheMalibuCrew!

As a guest, you are welcome to poke around and view the majority of the content that we have to offer, but in order to post, search, contact members, and get full use out of the website you will need to Register for an Account. It's free and it's easy, so don't hesitate to join the TheMalibuCrew Family today!

Idle High


Recommended Posts

My 2004 Malibu Response LXI with 250 hours on it occasionally idles high, above 12000 RPMS. Anyone no how to fix? Usually if I turn it off it will idle normally but not all the time. Seems to be getting worse. Has 340 Moonsoon Engine. Would appreciate any help. 

Link to post

Could be a gummy IAC, bad TPS, vacuum leak, or even a bad ICM under the distributor.

I would start with a full tune up to see if that cures it.

Link to post

I thought I read somewhere around that year the ECM program had an incorrect high idle to compensate for the previous year where the engine stalled when put in gear.  
 

Fixed with a subsequent reflashing of the ECM. 

Link to post

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.   Restore formatting

  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.

×
×
  • Create New...