[Syty] Need Help

[Rick In Central Texas]

I've been getting itermittent code 43's for about 2 years now.  Seems to be 
an intermittent open in the wiring  ... and it never had driveability 
problems like you describe.  If EST has a fault, boost is disabled, 
otherwise truck should run OK, but watch out for situation which might cause 
detonation.

Fo your symptoms, I would suspect IAC problem, or a vacuum line/fitting 
broke and you now have a big vacuum leak.  Keep us posted on the 
troubleshooting progress...


From: Jason Granger <loeryder at swbell.net>
To: MrGhst at aol.com, syty at syty.org
Subject: Re: [Syty] Need Help
Date: Fri, 20 Jul 2007 11:53:16 -0700 (PDT)

Code 43 EST typically points to the knock sensor.

They are cheap but a pain to replace.
You can find it threaded into the block just behind the drivers side head.
It will have a single dark blue wire leading to it.

Be sure to not overtorque it.
I think it is rated for 14 ft/lbs.



MrGhst at aol.com wrote:     Dear SyTy Intelligence Squad:
      The other day as I made a turn, the engine  died.  It re-fired right 
away upon key turn and the tach jumped around a  bit but settled down.  When 
the engine RPM dropped to 1000 RPM it died  again.  I found myself nursing 
it home keeping it above 1000 RPM.   (Not a problem except at lights and 
stop signs.)  I got a code of 43  that my code reader says is EST circuit - 
low voltage detected  or ESC circuit problems.
      Could this be THE problem or is this a  different problem?  If it is 
THE problem, what's the next  step?  (I guess either way, I'll need to know 
the next step.)  If it  is not the problem, what else should I be looking 
for?

  Thanks,
  Mark




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Jason
92 Typhoon #2407
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