General support questions thread

[filip5]

I just sow your video. Yes, I guess pull downs are required since the controller needs to boot.

[filip5]

Yes, lets have pull down resistors on all ignition outputs PC9,PC7, PE14, PE12,PE10, PE8, PD9 and PD8. That is best. The software in the controller is not pulling them down as of now the ones that re not used and possibly during boot of the controller none is pulled down. I just put the power jumpers for U603 and U604 and the remaining outputs PE10, PE8,PD9 and PD8 have all turned on. The voltage on those pins ranges from 0.92v, 0.92v, 2.93v and 2.93 volts respectively while controller is running( PE10, PE8, PD9 and PD8 are not configured). I thought it could be a way to not modify the board and just do that in the software but installing pull downs would be the way to go.

[filip5]

Can someone help with trigger configuration for a Nissan ( engine KA24DE) which has a 180 degree reference signal and a 360 pulse signal from the camshaft( 360 pulses or I could use 720 pulses for 2 rotations)?

[AndreyB]

Do you have a picture of trigger wheel - is it only one slot on the sync channel?

I will add custom code for this trigger if its different from the other nissan we have.

[filip5]

A question if someone can answer it. Does anybody know if Rusefi will adjust the amount of fuel injected in the cylinder in close loop correction( O2) sensor or air/fuel ratio monitoring when it swings out of 14.64 value ratio?

[filip5]

Getting back to nissan. The attached picture show the existing cam disc that produces the 180 ref signal and 1degree accuracy out of 360 and the disk that megasquirt recommend for nissan.

[stefanst]

Holy resolution overkill!
That's a lot of slots on a small wheel.

On the closed loop fuel: Yes!
The longer answer: rusefi has a target table for AFRs. So if you're targeting 12.5 AFR then rusefi will adjust fuel until the wideband reads 12.5. If you're targeting 14.7, then it will adjust to that. That's one of the advantages of a wideband over a narrowband sensor.

Afaik the closed loop fuel is largely untested, but it really shouldn't be an issue.

[AndreyB]

Yes fuel closed-loop but only with wide-band sensor at the moment, On the other hand there is https://github.com/rusefi/rusefi/issues/385 feature request, there are claims that some level of tunability is possible even on a narrow-band.

[filip5]

I am not getting my posts here any more(General support questions thread). Any idea where should I look for them?

[filip5]

ok, I see it is next to 2

[filip5]

Another question. I have assigned the idle valve on PD9, trying to see how it works. I also have assigned the MAP sensor on A4. I am still testing on a desk with simulated cam and crank signals but what I have noticed is that the idle valve does not turn off either when RPM is increased or when the MAP pressure is increased even as high as over 235 kpa. Is there a issue with it ?


Also is there a way to turn the fan on if the CLT sensor is defective( short or open circuit in which case the temperature gauge is set at 70 degree Celsius) since the temperature of the coolant is unknown?

[AndreyB]

Also is there a way to turn the fan on if the CLT sensor is defective( short or open circuit in which case the temperature gauge is set at 70 degree Celsius) since the temperature of the coolant is unknown?

Great idea, thank you! https://github.com/rusefi/rusefi/issues/412

[AndreyB]

Another question. I have assigned the idle valve on PD9, trying to see how it works. I also have assigned the MAP sensor on A4. I am still testing on a desk with simulated cam and crank signals but what I have noticed is that the idle valve does not turn off either when RPM is increased or when the MAP pressure is increased even as high as over 235 kpa. Is there a issue with it ?

Not sure what exactly seems to be an issue? Currently IAC control is pretty rudimentary see http://rusefi.com/wiki/index.php?title=Manual:Software:Idle_control

[stefanst]

Not sure what exactly seems to be an issue? Currently IAC control is pretty rudimentary see http://rusefi.com/wiki/index.php?title=Manual:Software:Idle_control

Idle control valve should be closed and PID disabled when the engine leaves idle-state. Throttle should be the only thing allowing air into the intake when the engine is not idling. In addition, idle PID will be lowering idle PWM when the throttle is open, because it reads the rpm as above target. Idle PID will fail at lowering rpm, because the throttle is open, so the I-term of idle PID will go as small as possible. As a result, when the throttle closes, the engine will stall.

[filip5]

ok, thanks . I did check the throttle just now, at 100% WOT this valve is not turning off. Speed 2799rpm, throttle 100% . Idle valve still on.

[stefanst]

ok, thanks . I forget to check throttle.

I don't think even throttle is implemented yet.

[filip5]

Okay. Thanks

[Rhinoman]

Getting back to nissan. The attached picture show the existing cam disc that produces the 180 ref signal and 1degree accuracy out of 360 and the disk that megasquirt recommend for nissan.

The 360 slots plus four is the same as a Suzuki model, I have one of these in my lab.

[AndreyB]

Idle improvements are https://github.com/rusefi/rusefi/issues/4

[matt]

Getting back to nissan. The attached picture show the existing cam disc that produces the 180 ref signal and 1degree accuracy out of 360 and the disk that megasquirt recommend for nissan.

The 360 slots plus four is the same as a Suzuki model, I have one of these in my lab.

which suzuki engine using and from what chasis? i wonder if suzuki sierra using this, it will be a great news for me.

[filip5]

Does anybody know what GPIO_1 means and where to look for its setting ?

[AndreyB]

Does anybody know what GPIO_1

where is GPIO_1 coming from?

[filip5]

where is GPIO_1 coming from?
It was coming from a conflict when I was trying to assign an output. I looked for GPIO_1 but could not find it in the lists. I don't remember exactly which output was but it was one of the outputs that are available and not used in injection from inj5 to inj12 or ignition from ing5 to ign8 so it should have been available. I reconfigured all outputs again and the conflict did not show up anymore.

[AndreyB]

where is GPIO_1 coming from?

Just realized aux_pid was not mentioned on All Pins window - fixed now!