jacob80 Posted February 3, 2010 Share Posted February 3, 2010 Hey guys, so I finally got my car running and idling decently, but now I want to follow the mega manual and go through the whole tuning procedure in their order. Well, the first thing on their list, after you get your car idling, is to tune the idle for lowest kpa, which I believe it is at untouched at about 31/31/33 kpa at idle. Okay, easy enough. I then move onto the next section which talks about setting your PWM. So I do that and it proceeds to tell me to decrease my PWM duty cycle (I assume this is equivalent to current limit) in 1% increments. Well, going from the suggested 30%, I proceeded all the way down to 1% in which there was no change in idle quality but simply died at this point. The process basically told me to decrease it until the quality deteriorates and at that point, increase it 3-5%. Well I'm looking at a lot of your guys' maps and yours not only even below thirty, some of you have it set at 45. Maybe current limit is not the same as duty cycle. Could somebody clear this up for me? Any help is appreciated, thank you! Quote Link to comment Share on other sites More sharing options...
BLOZ UP Posted February 3, 2010 Share Posted February 3, 2010 It limits current by applying PWM, so I think what you are talking about: Current limiting and PWM, are the same thing. Quote Link to comment Share on other sites More sharing options...
jacob80 Posted February 4, 2010 Author Share Posted February 4, 2010 Okay, assuming that, I did adjust the correct parameter but...now what? Quote Link to comment Share on other sites More sharing options...
Matt Cramer Posted February 4, 2010 Share Posted February 4, 2010 I think in your case the pulse width is barely longer than the PWM time threshold. You may need to tune the PWM criteria at a point where you have more pulse width (but still aren't under serious load - you don't want to lean it out at full throttle!). Quote Link to comment Share on other sites More sharing options...
jacob80 Posted February 4, 2010 Author Share Posted February 4, 2010 Well right now, I'm attempting to dial in a good, solid idle. How should I go about doing this? The idle is faiy stable as-is, but tends to hickup and die after prolonged idling. Once again, any help is appreciated. Thanks! Quote Link to comment Share on other sites More sharing options...
z-ya Posted February 4, 2010 Share Posted February 4, 2010 If you have the "Require Fuel" set according to you injector size and displacement, then go to the VE table and adjust the active bin (and surrounding ones) until you get a smooth idle. As far a a hickup, do you have EGO enabled? If so, turn it off for now. What injectors are you using? Look at the injector spread sheet sticky and use the settings there if your inejctor is in the table. Quote Link to comment Share on other sites More sharing options...
jacob80 Posted February 4, 2010 Author Share Posted February 4, 2010 Okay, I will check the ego settings. I am using 42 lb/440cc Bosch low impedance injectors. Quote Link to comment Share on other sites More sharing options...
mobythevan Posted February 4, 2010 Share Posted February 4, 2010 You are tuning idle with the engine completely warmed up right? Otherwise warm up enrichments will be going and tuning idle won't accomplish anything. Quote Link to comment Share on other sites More sharing options...
jacob80 Posted February 4, 2010 Author Share Posted February 4, 2010 I am using your map moby, and I am letting it warm up to about 180 degrees before I do any adjustment to any settings. How do I manually disable all enrichments? I've read somethingabout turning gamma setting to off will do this, correct me if I'm wrong, thanks! Quote Link to comment Share on other sites More sharing options...
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