kizzoalfa wrote:If you have MS3x, use the Idle output. Also make sure you have the antiparalel diode for your valve. The built in flyback circuit of the MS3x does not works with the Bosch 2 wire solenoid since the clamping voltage is high and due to to high flyback energy the effective driving power for the motor is lower. Add a diode from Idle to +12V (Idle should be the anode) - you can put it to your valve harness. You have idle when you disconnect the motor is because the Bosch valve is normally open (you can look inside) and when you apply like 30% PWM than it just closing and probably fully open at 80 % PWM.
You can connect the valve and try HW test in the output test section of TS: first set the frequency (around 200Hz) and than determine the closing and maximum opening points. (Without the diode it will not work.)
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