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The Terminator
Engine/Tuning
Megasquirt idle issues
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<blockquote data-quote="01yellercobra" data-source="post: 16452224" data-attributes="member: 35549"><p>Under fuel settings you'll see VE1. That's where you're going to adjust your fueling. With SCT you're modeling the airflow. With Tunerstudio you're modeling the fuel flow. I had to get my head around that in the begining. </p><p></p><p>There's a couple tables for cranking you'll have to adjust. I don't remember them off the top of my head. They'll have an engine temp in one column and a percentage in the other. So if the hard start is at 80° then there's no need to touch the 60° bin. Plus you can change the temps. I think in the base tune it goes down to -40°F. Well, the coldest my car sees might be low 40's. So I adjusted my tables to only go down to 0°. </p><p></p><p>I do have the idle PID controls active, but you need to get a stable idle and tip in before messing with those. Get the idle fuel and advance dialed in then you can mess with the PIDs. Those are more for returning to idle anyway. Such as coasting to a stop (aka dashpot decay rate).</p><p></p><p>When I started driving mine I used the Autotune feature to start dialing in the A/F. Then I used the the VE Analyzer in the Megalog Viewer to final tweak.</p><p></p><p>Also, you did set up your A/F table right?</p></blockquote><p></p>
[QUOTE="01yellercobra, post: 16452224, member: 35549"] Under fuel settings you'll see VE1. That's where you're going to adjust your fueling. With SCT you're modeling the airflow. With Tunerstudio you're modeling the fuel flow. I had to get my head around that in the begining. There's a couple tables for cranking you'll have to adjust. I don't remember them off the top of my head. They'll have an engine temp in one column and a percentage in the other. So if the hard start is at 80° then there's no need to touch the 60° bin. Plus you can change the temps. I think in the base tune it goes down to -40°F. Well, the coldest my car sees might be low 40's. So I adjusted my tables to only go down to 0°. I do have the idle PID controls active, but you need to get a stable idle and tip in before messing with those. Get the idle fuel and advance dialed in then you can mess with the PIDs. Those are more for returning to idle anyway. Such as coasting to a stop (aka dashpot decay rate). When I started driving mine I used the Autotune feature to start dialing in the A/F. Then I used the the VE Analyzer in the Megalog Viewer to final tweak. Also, you did set up your A/F table right? [/QUOTE]
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