Mazda 323 1988 Handbuch PDF herunterladen (Seite 6)

Step 62 – PWM Q2 and Q4

Since I will be controlling the stock GTX PWM idle valve, I followed the instructions in this section

marked “For PWM Idle Valve Users Only”. I chose to route the emitter terminal of the transitior to

the right side of R39 and not install the jumper, only because it makes the installation just a bit

cleaner.

Once this modification is completed, MegaSquirt will be able to directly control the stock GTX idle

valve. The PWM signal will come out of the MegaSquirt's DB37 on the standard FIDLE pin 30.

The extra components for the idle control circuit modification can be purchased in a kit from

DIYAutotune.com.

http://www.diyautotune.com/catalog/pcbv3-pwm-iac-valve-control-tip120-39modkit39-p-134.html?

osCsid=5b6626a913b52a892206384ace90613e

Step 65 – Ignition Driver – INSTALL

I followed the instructions for installing the two ignition driver circuits from the MS2-Extra manual:

http://www.msextra.com/doc/ms2extra/MS2-Extra_Ignition.htm#1coil

http://www.msextra.com/doc/ms2extra/MS2-Extra_Ignition.htm#2coils

Step 69 – PWM Flyback Circuit – INSTALL

This step installs components necessary for damping the high current flyback energy generated when

running low impedance (peak and hold) fuel injectors. The stock GTX injectors are high impedance

injectors and do not strictly need this flyback damping, but I recommend installing this circuit anyway

since it doesn't have any adverse effects, and it will be in place if I decide to got to larger low

impedance injectors down the road.

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Mazda 323 1988 Handbuch Seite 6