Some time ago i posted a circuit diagram for the 3-wire valve. Some members have build it and it seems to work for them.
Only draw back is that it uses a lot more components.
Also look here how toyota drives the 3-wire valve: http://www.autoshop101.com/forms/h26.pdf page 6.
SFC
Posted by email.----- Original Message -----
From: captain16vgti (captain.alpha.13@gmail.com)
To: megasquirt-mss@msefi.com (megasquirt-mss@msefi.com)
Sent: Saturday, July 15, 2006 7:29 AM
Subject: Questions about PWM Idle circuit
Jon if you get your 3 wire setup working please let us know. I gave up on trying to get mine working cause I couldn't get a straight answer from anyone regarding these issues. Good luck man.
-Chris
This post is at: http://www.msefi.com/viewtopic.php?p=130689#130689