did I route the inector shroud line wrong? (4ktq)

JShadzi at aol.com JShadzi at aol.com
Fri Sep 15 00:31:00 EDT 2000


In a message dated 9/14/00 11:39:37 AM Pacific Daylight Time, 
marcswanson at mediaone.net writes:

<< I've been having a persistant problem with a high idle on my 4ktq.  I went
 up to Nate's place to see if two heads were better than one and it turned
 out that by pinching the hose I have going from the turbo (boost) side of
 the intake to the injector shroud (and the isv), the idle would drop back to
 normal.  At the time I was running a crankcase breather filter so the
 thought was that unmetered air was getting sucked in under vacuum through
 the crankcase breather filter.. But I today removed the filter and rerouted
 the hose over to the intake.. but still have a high idle!!!  Is there some
 kind of a restrictor or something in the stock 5kt IM setup that prevents
 this from happening?
  >>

    Marc, you need to make sure that your inj. shround vacuum line is only 
recieving vacuum from behind the TB, if in front then you are bypassing the 
ISV and the TB both.  You should run if off one of the fittings on the back 
(firewall side) of the IM.  HTH,
Javad



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