This release is a major revision change. Please note that you must be running at least v3.18.205 of the laptop application before you upgrade your firmware.

This release adds a number of major new features to the ECMLink device.

First and foremost is speed density support. SD operation is explained in a lot more detail on the following pages.

• Basic, high-level SD operation details
• Details on setting up ECMLink for SD operation
• Dial in the VE table while running off a mass airflow sensor
• Dial in the closed-loop parts of the VE table while running SD (uses fuel trim data)

If you've wanted to run more than 4 injectors, here you go. You basically configure a set of conditions to trigger the mode and then configure how fuel should be adjusted when the mode is active. You can even dial in a delay between when the mode is technically triggered and when the adjustments actually go active. This can help with installations that use a mechanical relay, for example, to activate the secondary injector bank inputs to their injector driver box.

Want to see what this roughly looks like? Screenshots are provided below.

http://www.ecmtuning.com/images/forums/announce-2009-04-22/auxmaps.png
http://www.ecmtuning.com/images/forums/announce-2009-04-22/fpsoutput.png

Yes, we're finally adding the concept of switchable maps. These are complete copies of your fuel and timing maps that you can switch between at any time. You can either have these switched on automatically based on a set of criteria you define (for example, to switch in a set of aux maps when nitrous activates) or you can define an input into the ECU to have active control over the switching function yourself with an external switch of some sort.

A screenshot is actually part of the AuxMaps shot posted above.

http://www.ecmtuning.com/images/forums/announce-2009-04-22/auxmaps.png

Having control over the fuel pressure solenoid output has been used for several years to do all sorts of things, even some we never envisioned. But the need exists for additional control, so we're adding the same type of functionality to the EGR output as well. You can use this output for all the same stuff you could with the FPS output. You can control your cyclone manifold, for example, or your BOV bottom-port pressure or activate nitrous or water injection, etc., etc.

We have entirely redone the output control logic. Now you can configure RPM, LoadFactor, TPS, speed and knock sensor windows to do just about anything imaginable. Parameter “windows” provide more flexibility. You can have them trigger above, below, or in between whichever activation points you have an interest in.

A screenshot is below of the new FPS controls. EGR output controls are identical.

http://www.ecmtuning.com/images/forums/announce-2009-04-22/fpsoutput.png

• Changed MAF Clamp to work better with GM MAF sensors connected directly to the ECU. Previous versions did not work as well as we'd like with the choppy GM MAF signal. On some cars, the MAF Clamp function could get activated by a spike in the GM MAF signal that would never “unclamp”. This version addresses that issue by providing additional input signal smoothing to prevent momentary glitches from triggering the MAF Clamp function.
• Corrected bug in 2G chips that kept optional DTCs disabled. Although the application showed that the DTCs were checked and enabled, the ECU was not actually performing those checks.
• Fixed bug on 1G ECUs that could corrupt datalogging stream table when the ECU is first powered on for the very first time after installing V3.

• Fixed bug on 1G ECUs that prevented the ECU from simulating airflow from throttle position when the MAF volume signal is lost.
• Selecting a GM MAF sensor as the base sensor now implicitly locks IAT and Baro signals for you.

• Original release.