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Old 05-30-2010, 06:00 PM   #1
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Default New injector PWM settings...

So this morning I swapped in my 460's. The only thing I changed was my required fuel setting. The car started fine, and I VE analyzed it one time, and everything looks good. I was reading the Megamanual and it says this:
If you are running high-impedance injectors (greater than 10 Ohms), then set the:
PWM Time Threshold to 25.4 msec, and the
PWM Current Limit (%) to 100%.
(The presence or absence of the active flyback circuit (v3) or flyback board (v2.2) doesn't matter for high impedance injectors.)

If you have low impedance injectors (less than 4 Ohms), set the:

PWM Time Threshold to 1.0 msec, and
PWM Current Limit to 30% in most cases (all V3 main board with active flyback installed, and all V2.2 main board with flyback daughter board installed).
Set the initial PWM% to 75% if (and only if) you have low impedance injectors and have NOT installed:

the active flyback circuit on a V3 main board (assembly manual step #69), or
the 'Flyback Board' daughter card on a V2.2 main board).
I'm pretty sure my RX-7 460's are low impedence, but according to my tune, it's set for high imp. What imp are the stock injectors? If I don't have my MS set correctly, why does it still run so well?
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Old 05-30-2010, 07:18 PM   #2
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All the 460s I've ever seen were high impedance.

What's the denso number on the side of the injector. Cross refrence that to see what impedance they are. Or use a multimeter to check them. Maybe they are high impedance.
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Old 05-30-2010, 07:47 PM   #3
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what's your point? you have high ohm keep the settings the same...basically PWM is turned off.
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