Jump to content
The mkiv Supra Owners Club

High Speed Boost Question


Matt H

Recommended Posts

the hks evc iv on mine drops the boost to stock levels if it reaches the preset warning, set to 1 bar, warning was also 1 bar so when it exceeded this slightly it beeped away and cut boost, not sure what 'stock boost' is though. Same happens when it is set to high 1.2 bar with the warning at 1.2, if it slightly exceeds this then the boost will drop. Sound like the problem you have?

Link to comment
Share on other sites

does sound like a misfire fits the description, as if the plugs aren't sparking properly or fuel starvation?

 

a visit to a decent rolling road who can measure your fuelling as it happens is an option? AwesomeGTI in Manchester were good last time we went. it'll cost you £60 to turn up & get a session with them or wait for a group day & it's about £35 (but they don't always measure fuelling on group days).

 

If it's doing this even when your boost controller is switched off, it is possible you don't have a restrictor ring in the exhaust & so there's nothing stopping the boost going above what it should be doing? i remember Mr Wilson telling me that even if you have a boost controller you still need a restrictor ring :)

Link to comment
Share on other sites

  • 1 month later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

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...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. You might also be interested in our Guidelines, Privacy Policy and Terms of Use.