MSefi.com read only forum (Jan.15,2018)

Hello,

How I'm suppose to figure out what's the right frequency for my idle valve ? Also Cranking DC, Minimum DC and all the other stuff ? Not sure if I'm missing something but it doesnt seams to be in the doc anywhere

Also, "When to use PWM idle:", if I set it to closed loop like a lot of people seams to put it to, I won't have idle control at warm up ? Isn't what idle control is for (more for warm up then anything ) ? Again, what I'm missing there

Thanks!

Closed loop works all the time, not just when warm - that's why you have temperature settings on it for cold (choose a temp as low as you expect to see ever) and hot (choose something just below your normal operating temp as anything past this will maintain the same hot DC). It uses the two temps and idle speeds to give a linear interpolated line of engine speeds depending on your current temp, and it will try to maintain that regardless of loads etc.

As for settings - its pretty much trial and error - go with a low frequency, start with cranking at about 50% and see how it fires, then trial and error-it to see what helps. Then when it is warm, get your idle speed as low as possible and set your minimum DC to about 3 steps lower than that - the valve will then never close more than that. There are a few other tips on the forum, or there were 2 years ago when I looked to sort mine out.