The MegaSquirt Project has experienced explosive growth other the years, with hundreds of new MS installations occurring every week - a phenomenal success! MegaSquirt has been successfully used in all aspects of Internal Combustion engine applications including R&D, Industry, Race, and Research. The MS project has transformed itself from a simple R&D project into a full-featured mature engine control system. To reflect this the support structure has also changed to meet the needs of MegaSquirt Users.
Moving forward, the R&D forums for MegaSquirt project are in a read-only mode - no new forum posts are accepted.
However the forums will remain available for view, they still contain a wealth of information on how MegaSquirt works, how it is installed and used. Feel free to search the forums for information, facts, and overview.While the R&D forum traffic has slowed in recent years, this is not at all a reflection of Megasquirt users, which continue to grow year after year. What has changed is that the method of MegaSquirt support today has rapidly moved to Facebook, this is where the vast majority of interaction is happening now. For those not on Facebook the msextra forums is another place for product support. Finally, for product selection assistance, all of the MegaSquirt vendors are there to help you select a system, along with all of the required pieces to make it complete.
Forum rules Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
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!
1993 Chevrolet Cavalier Z24
Turbocharged Intercooled 3400
MS3 with MS3x / 1.1.1 firmware
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.
MSnS-E29q On a V2.2 was powering a 3S-GTE with stock sensors hopefully to approx 300 bhp until i blew a CPU
Datalogs and current MSQ at my site - http://www.jbuckle.homeip.net/
