Home / Toyota Supra Forums

Go Back   Toyota Supra Forums! Join the Supra forum! > Performance, Modification, and Maintenance Forums - for generation specific discussions > MKIV Supra
Reload this Page Boost 'struggle'??
Register Write a Review Blogs FAQ Calendar Today's Posts Search

Reply
 
Thread Tools Display Modes
Old 09-25-2011, 04:21 PM   #1
pwpanas
Supra Owner
 
pwpanas's Avatar
 
Join Date: Oct 2005
Location: GA, USA
Posts: 2,209
pwpanas is on a distinguished road
Default
Quote:
Originally Posted by winnas13 View Post
After doing some reading and searching on google for 'boost leak' I reckon that this is exactly what's wrong with my car. When the boost kicks in it just feels weak and sluggish, maybe overboost?

I'm an absolute noob at this stuff, has anybody posted a how-to?

Extra: Just realised i've never looked at the boost gauge when i floor it. It's all over the place! jumps to 0.5 bar, then down to 0.1.. back up...

Does that scream anything?
You need to pressurize your intake system with an air compressor (up to 15psi should be fine) ... all the way from the air filter/maf back...and listen for leaks. You'll have to rig up an adapter from your intake/maf to the air compressor.
__________________
Phil '94 Supra Turbo, 6spd, 'APU'+
Displacement is no replacement for boost.
Life begins at 30psi.

NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners.
pwpanas is offline   Reply With Quote
Old 09-29-2011, 09:36 AM   #2
winnas13
Stock
 
Join Date: Aug 2011
Location: Adelaide, Australia
Posts: 22
winnas13 is on a distinguished road
Default
Quote:
Originally Posted by pwpanas View Post
You need to pressurize your intake system with an air compressor (up to 15psi should be fine) ... all the way from the air filter/maf back...and listen for leaks. You'll have to rig up an adapter from your intake/maf to the air compressor.
It turned out to be fuel cut!
winnas13 is offline   Reply With Quote
Old 09-30-2011, 01:15 AM   #3
pwpanas
Supra Owner
 
pwpanas's Avatar
 
Join Date: Oct 2005
Location: GA, USA
Posts: 2,209
pwpanas is on a distinguished road
Default
Quote:
Originally Posted by winnas13 View Post
It turned out to be fuel cut!
Awesome - glad you got it figured out, and even more glad that your Mkiv Supra TT is behaving exactly as Toyota built it to.

What I'd be a bit critical of is *anyone* trying to raise boost without doing *all* of the BPU mods. The "BPU" spec was written for a reason - so no one would have to worry about stuff like fuel cut when modding their Mkiv Supra TT! Sigh.
__________________
Phil '94 Supra Turbo, 6spd, 'APU'+
Displacement is no replacement for boost.
Life begins at 30psi.

NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners.
pwpanas is offline   Reply With Quote
Old 09-30-2011, 07:14 AM   #4
winnas13
Stock
 
Join Date: Aug 2011
Location: Adelaide, Australia
Posts: 22
winnas13 is on a distinguished road
Default
Quote:
Originally Posted by pwpanas View Post
Awesome - glad you got it figured out, and even more glad that your Mkiv Supra TT is behaving exactly as Toyota built it to.

What I'd be a bit critical of is *anyone* trying to raise boost without doing *all* of the BPU mods. The "BPU" spec was written for a reason - so no one would have to worry about stuff like fuel cut when modding their Mkiv Supra TT! Sigh.
Yeah... I bought this car from a young girl who obviously did not care for it and had no idea how to. Her idiot boyfriend probably raised the boost and didnt know what to do about the fuel cut!

Thanks for your help
winnas13 is offline   Reply With Quote
Reply

« Previous Thread | Next Thread »

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
1jzgte no boost???????????????? MAP sensor? You have one? AlexSchuSupra MKIII Supra 3 06-17-2010 08:10 PM
Wont accelerate under boost, misfires, backfires, and wont idle Andrew - turbo a MKIII Supra 1 07-24-2009 01:39 PM
wont hold boost Supraman MKIII Supra 12 04-19-2007 04:52 AM
issue w/ boost spikes? i think? NOTORIOUS VR Non-Generation Specific Questions 17 01-17-2007 08:35 PM
installing manual boost controller 1989?? hamburgler MKIII Supra 4 07-13-2005 12:55 PM


All times are GMT. The time now is 10:27 PM.

Contact Us - Toyota Supra Club - Archive - Top

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.

1986



1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87