Jump to content
The mkiv Supra Owners Club

bpu boost problems


girth45

Recommended Posts

  • Replies 70
  • Created
  • Last Reply

Top Posters In This Topic

I had a similar problem a while back, and it turned out that my iacv vsv had failed. I used a battery and the bgb to test it.

 

I bought a used good one off a member on here, which cured the problem straight away.

 

I've just removed all of my vsvs as I'm going single. Not sure if I want to part with all the bits just yet, until I'm sure it's all good, but you're welcome to borrow it to rule yours out

Link to comment
Share on other sites

Sorry I'm a bit lazy so didn't read every post yet. Have a look at the pipes joining the T piece to the Turbo inlets. They have two layers and with age and temperature they collapse inside but look good outside. When this happens the Turbos won't boost to the desired pressure anymore. Change them to New OEM ones or good aftermarket and have a go :)

Link to comment
Share on other sites

Well here is an update, boost problem now sorted :D

After replacing turbo link pipes, all vac hoses, bore scoping turbos, smoke testing pipework, finally checked vcv valves.

Vacumn control Valve above no 2 turbo was not actuating properly, after replacing this ,boost back to normal ( boosting even better than ever now) so sourced replacements also changed valve in front of no 1 turbo,( thanks jos)

Thanks to all for there help and advice.

 

:thumbs:

Link to comment
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.
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.