What is closed loop idle control?

What is closed loop idle control?

Closed loop mode tries to maintain a target idle speed. While not every car needs closed loop idle, it can help compensate for major changes in load. For example, if the idle drops an unacceptable amount when you turn the air conditioning on, you can use the closed loop control to compensate.

What RPM should I set idle at?

For a passenger car engine, idle speed is customarily between 600 and 1000 rpm. For medium and heavy duty trucks, it is approximately 600 rpm. For many single-cylinder motorcycle engines, idle speed is set between 1200 and 1500 rpm.

How can I make my car idle lower?

Turn the idle screw, now exposed from the protective rubber coating, in order to adjust the idle. Loosen the screw in a counter-clockwise fashion to increase idle speed or tighten it in a clockwise manner in order to decrease the idle speed. Ideally, you will want the idle to rest at 650 RPM.

Does MegaSquirt self tune?

Auto tune on a Megasquirt comes pre programmed, auto-tune to only tune to 14.7 AFR and only under vacuum. If you want to use the autotune feature of your MS then you need to do a few alterations to set it up with your wideband.

What should IAC be at idle?

The typical consumer car will idle somewhere in the range of 500-1000 RPM, depending on the vehicle. Consult your owner’s manual to find your specific car’s normal speed. High-strung performance cars may have higher idles, and motorcycles have idles that range between 2,500-4,000 RPM.

How do I reset my IAC valve?

Turn the ignition ON and leave on for several seconds then turn the ignition OFF to allow the ECM to reset the IAC valve. You should be good to go.

Does the ECU control idle?

The Idle Control function allows your ECU to control the engine idle speed. There are multiple ways this is achieved with either Drive-By-Wire (DBW) control, a Bypass Air Control (BAC) solenoid with either two or 3 wire types, or via a Stepper Motor system.

What is idle PID?

PID is a “closed loop” control algorithm (instructions for solving a task) used to adjust a control value, (eg a idle valve position).

Where to find idle valve settings on MegaSquirt?

The X axis is your target rpm values. The values should be set to give you an rpm slightly above your target rpm. To set these values you can use the idle valve test mode located under CANbus/Testmodes>Output Test Mode – Idle Valve.

Can a MegaSquirt 2 control a stepper?

The MegaSquirt-II and MegaSquirt III (as well as related systems like the MS3-Pro) can control a stepper IAC valve, but these are a little bit involved to set up than a PWM type. Here, we’ve put together a range of tips for how to set up and troubleshoot stepper idle air control valves.

What are some of the issues with the MegaSquirt?

For several months now, we’ve been slowly tweaking the tune to overcome numerous issues such as starter kickbacks, high idle RPMs, idle hunt, and inconsistent starts. One of the biggest mistake we made was to assume that the MegaSquirt was truly a Plug-n-Play solution.

When to use closed loop on MegaSquirt extra code?

The MS/Extra code variants provide a closed loop feature that allows targeting a specific idle speed. I recommend leaving the closed loop control off until you have the engine idling well at a steady load.