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<DIV><FONT color=#000000 size=2>From the gm EFI training manual</FONT></DIV>
<DIV><FONT size=2>Quad driver, Integrated cicuit that is capable of four
different outputs. Some are digitial, others PWM. </FONT></DIV>
<DIV><FONT size=2>A quad driver is a switch that provides a
ground.</FONT></DIV>
<DIV><FONT size=2>If of a newer type it is self limiting for current draw but
can fail from thermal break down.</FONT></DIV>
<DIV><FONT color=#000000 size=2>That needs fixed first sounds like a serious
error.</FONT></DIV>
<DIV><FONT size=2>If you have any 50 series codes those gotta be fixed
first.</FONT></DIV>
<DIV><FONT size=2>Use one computer an the hardware that matches that.
Things can look identical and be different......</FONT></DIV>
<DIV><FONT size=2>Bruce</FONT></DIV>
<DIV><FONT color=#000000 size=2></FONT> </DIV>
<DIV><FONT color=#000000 size=2>Hey all.. I just finished up a 3800 series II
supercharged motor swap.. putting that motor in a 1988 buick lesabre T-type
that had a 3800 series I code C motor. I have gotten two codes that are
confusing me.. the first is a "est circuit fail" ... the new 97 ignition coil
has been used with the old computer... and yes, I"m using the old computer at
the time... the other code that is on there is "quad driver failure" code. I
don't know if that is related to the egr codes which I also have... but am not
concerned about right now...</FONT></DIV>
<DIV><FONT color=#000000 size=2>does anyone have any detailed info on those
two codes, why they would show up, or what the common problems related to them
are?</FONT></DIV>
<DIV><FONT color=#000000 size=2></FONT> </DIV>
<DIV><FONT color=#000000 size=2>BTW.. I have checked the knocksensor wires to
ground and get a resistance of 3.9ish kilo-ohms... so I know that there isn't
a short to ground there.. and I took the two knock sensors on the new 97
motor... and tied them together... Any help is much appreciated , and thanks
in advance all! just trying to get as much input as I can so I can drive the
car.</FONT></DIV>
<DIV><FONT size=2>Regards, </FONT></DIV>
<DIV><FONT size=2>Kevin</FONT></DIV></BLOCKQUOTE></BODY></HTML>