Jump to content

993 '96 ISV/ICV (Idle Stabilizing Valve or is it Idle Control Valve ?) clean and effects


Ardyne
 Share

Recommended Posts

HI All, Not sure if its an ISV or ICV. Had revs holding after clutch engagement. Read the ISV can be an issue for this (dunno if true). Took mine out and gave it a good clean with carb cleaner. Still too early to tell if its fixed the issue as it was intermittent however..... Wanted to ask what effects cleaning the ISV had on the car. For example when revving out in second it was common for there to be a retardation in the revs from say 4 to 5.5-6K, almost like I could feel the varioram adjusting (best way to describe it). It was I guess a non linear rev increase from 4 to 5.5-6K. Since cleaning this mystical ISV it feels to rev much more smoothly. Im assuming its a placebo but at the moment its a lot more linear up to the redline.

1. Would the ISV affect this non linear effect I was experiencing ?

2. What else does a non functioning ISV affect ?

 

Thanks

P.S not the greatest photos sorry

20240802_100620[1].jpg

Screenshot_20240803_123641_Gallery[1].jpg

Link to comment
Share on other sites

Hanging revs have not reappeared. Revving from 4 to 6.5 is heaps smoother. I'm not a mechanic so I can't definitely say this clean was the solution or whether it a coincidence but what I would definitely do is pull the front hose off and take a look inside....

Link to comment
Share on other sites

  • 2 weeks later...

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...
 Share

×
×
  • Create New...