Boost spike

[RedSuns]

I have a manual controler that has served its purpose for about 2 months now...i have it set for 14psi and under WOT i go to 14psi and no more...in the past few days my boost will spike to 16psi for a split second then go back to 14psi...what culd be causing this......it has just started in the past few days...

[babylon02]

I know I don't have a lot of posts, but since when does that mean you really know anything? &nbsp;<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt=';)'>

Double check all your vacuum lines and make sure the condition of them is all good and that none of them are kinked, especially the one your boost controller is off of. &nbsp;Is your boost controller and boost guage running off of the same vacuum line? &nbsp;If so, you might want to isolate them and that might fix the problem too. &nbsp;I am guessing that you haven't made any other mods to your car recently. &nbsp;Because that could do it too.

Hope you find the problem.

[uiuc240]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (cIvIcKILLA240style @ Aug. 27 2002,03:31)</td></tr><tr><td id="QUOTE">I have a manual controler that has served its purpose for about 2 months now...i have it set for 14psi and under WOT i go to 14psi and no more...in the past few days my boost will spike to 16psi for a split second then go back to 14psi...what culd be causing this......it has just started in the past few days...</td></tr></table><span id='postcolor'>
Did the temperature recently change? &nbsp;MBC's are notorious for "adjusting" boost level due to temperature fluctuations. &nbsp;Maybe a cold front moved through. &nbsp;Maybe it's done this randomly on other occasions, too, and you just noticed it this time.

Otherwise, yeah, check vacuum lines.

Eric

[GamblerZ]

Changes in intake or exhuast will affect your boost pressure. &nbsp;Meanwhile, here is a good reference link:

<a href="http://www.racetep.com/turbo.html" target='_blank'>http://www.racetep.com/turbo.html</a>

[RedSuns]

well i did start to notice it after i put on my N1 dual.....thanks guys....

[uuninja]

I would say that it is your exhaust. If you were using the stock exhaust the turbo should be spinning up quite a bit faster now. MBC's are kind of like a blunt instriment, there is no way to get them perfect. If you are really concerned consider lowering the boost or gettign an electronic boost controler.