EST Distributor

[Keith D. Miller]

> -----Original Message-----
> From: owner-gmecm at diy-efi.org 
> [mailto:owner-gmecm at diy-efi.org]On Behalf
> Of Bob Wooten
> Sent: Thursday, March 29, 2001 7:56 PM
> To: gmecm at diy-efi.org
> Subject: EST Distributor
> 
> 
> Questions #2, I think also another simple question.
> 
> what is meant by EST?  I have a 91 Camaro that has an EST
> distributor (so says Mr. Chilton).

Electronic Spark Timing (so says The General).

>  what I have noticed, & I am guessing but want to clear
> it up is that EST is more a scheme than anything.  this
> means that the Distributor controls the spark duties
> w/the small input from the ECM for retard & LHM.  this
> means that the distributor conditions the PU coil, has
> the driver in it for the HV coil & outputs a signal that
> is used to determine RPM.
> 

The General goes on to say. "All spark timing changes in
the EST distributer are done electronically by an Electronic
Control Module (ECM) which monitors information from various
engine sensors, computes the desired spark timing and
signals the distrubuter to change the timing accordingly. A
back-up spark advance system is incorporated to signal the
ignition module in case of ECM failure. No vacuum or
mechanical advance is used."

Keith
--

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org