rusefi.com

Got to do some checking/scoping. All the sensor inputs work. Ignition and Injectors are being fired. The ignition looks indeed wasted and the injectors seem to be running sequentially. I did forget to check the other outputs- fuel pump, idle valve, fan, alternator. Also need to install a MAP sensor....

russian wrote:

stefanst wrote:Is there maybe anything funky going on with the battery voltage during those events?

It did not occur to me to record a log file while idling, all we have is the logic analyzer log of camshaft sensors and three ignition control channels.

Maybe there's something in one of the older logs?

Is there maybe anything funky going on with the battery voltage during those events?

So spark triggering is doing OK. This leaves us with hardware or fuel as a problem. Since most of the spark hw has been replaced without any notable change in result, I'd be looking at fuel next. We do usually see a brief lean-spike during the stumble, so fueling failing is definitely an option. The...

Alright, made some decent progress tonight. I have the board all jumpered and it's running successfully on the Jimstim. Hopefully I'll get to scoping the outputs tomorrow to make sure I won't blow anything up and then hook it up to the car on the weekend.

Talking about the missfire: I just read in the "Poncho" thread that the injector drivers can go into thermal protection mode. I haven't studied the datasheet, but they may also have over-current protection. An injector driver cutting out for a short period for over-current or thermal prote...

Just ordered the board. Will report back.

great- "self" is what I needed!
BTW: I'm old enough to have used hp pocket calculators and am still somewhat familiar with RPN. I also seem to remember a stack-based programming language named "forth" that I played around with in the eighties...

I am setting up VICS to be controlled with FSIO, based on rpm. Is there any way to program some hysteresis with FSIO? I would like VICS to come on at >= 5000rpm and turn off at <=4800rpm in order to avoid flutter.

Downloaded the new FW and rusefi.ini last night- thank you very much! I copied my fuel and spark maps over and noticed that the spark map looks very 'flat' when viewed in 3D mode. It appears this behavior is caused by the low/high values in rusefi.ini I changed the following: ignitionTable = array, ...

Since you're talking about error sources, I have one more: Static fuel pressure vs. dynamic fuel pressure: Dynamic: Flow rates for injectors are characterized depending on pressure differential (rail-intake). Most older cars with EFI run a return style fuel system where the fuel pump feeds the rail ...

You make it sound so simple!
Others have a much more impressive sounding name for it- "High-speed feedback field control"

More channels would certainly be welcome by many. Consider V-Engines with variable CAM timing. Or variable CAM timing for intake and exhaust. So a V-Engine with variable CAM timing could need 5 timing inputs! Add VSS and ABS sensors for launch control and similar shenanigans into the mix and I can s...

It's kind of doubtful that we'll burn out traces with the solution implemented by MS. The wire (field) into the alternator has 0V or close to it when not being driven- the alternator is not driving any current here. And if my 5V 1KOhm pullup is sufficient to excite the field and make it go full outp...

I just took the connector diagram I had from my MS3 install on my NB1 ('99 & '00) MIiata and updated it. Connections colored black are needed to make the car run consistently at all. Connections colored red are things that should be implemented soon Connections colored ochre/yellow are not reall...

What schematic do you use? Or what is the primary driving transistor? I"m guessing it's a reasonably high Rds MOSFET. The circuit used by russian can be found here viewtopic.php?f=4&t=747&start=36 I'm using one of the MS3Xs "spare" low-side pwm outputs (nitrous2) pulled up to...

Jason's circuit appears to be a hardware only solution. I don't see a MCU input, other than a disable for cranking input. It appears he's using a voltage reference which then runs a PNP transistor in it's analog region. At the core of this circuit, I think he tuned it's response to be around 1kHz. ...

The noise in the signal was caused by operator error.
I fed the signal into the brain-board directly, but without disconnecting the frankenso board first. Running the brain on the stim by itself yields perfect results

Also adding the jumper to PB1 certainly helped with TS.

Thanks!

This one is not a very important point- just requires a lot of checking an re-checking. When I opened rusefi.ini (from the 2/26/16 nightly build) pretty much all pins were set to pa0. I assume that's an effect from pa0 usually being the first pin in the option list in the TS setup. In other news: I ...

Some of us 'users' are tough guys :-) Just coming from my personal standpoint: I will never be able to actually help writing your FW. I may be able to critique it though! But when I'm looking for a simple answer on what something means, I always end up reading about some development wizardry that's ...

I'm trying to set up my car in TS and questions about what things mean come up... In general: - I would have all pins default to "NONE" instead of PA0. - In many cases the name of the menu point differs from the name displayed on the window. This confuses me.... - Pin mode usually offers &...

Since I started with rusefi last week, I constantly ask myself which part of the forum would be the right one to use for posting a question. And I realized that this is so far very much a developer's forum. My intention, in line with my abilities, is to be more of a user/tuner/implementer. And there...

This is indeed the chip on the board. If I had the ability to read, I could also have found that info right there on their webpage :D : http://www.ecotrons.com/wp-content/uploads/2015/09/ALM-B-system-new.jpg The board does also have an additional MCU. From the description again: Main-Processor • CPU...

kb1gtt wrote:I see reference to a circuit, but it appears it may have been lost in posts as the thread was split from another thread. Does anyone know where this schematic can be found?

Jason's circuit can be found here: http://www.miataturbo.net/megasquirt-18/disable-alternator-field-75009/#post1054645

Also spark cutoff if MAP above specified threshold, do I understand it right? https://sourceforge.net/p/rusefi/tickets/272/ Yes, but I would also cut fuel- no point in dumping fuel into an engine without spark- might even prove dangerous at some point. Or leave it to the user- offer both. Is that w...

I don't really know, what this means, but from the tone of what you're writing I infer that this is not a good thing....

I'd say first attempt should try to get close to what the standard aftermarket units offer. I only know Megasquirt and the -now defunct I believe- Link. So the status I described is close to the current status of the Megasquirt. All those flappers, valves etc. could be controlled via programmable ou...

The only chip that looks like it would be dealing with reading the wideband is a Bosch 30617.
It's very hard to read the chip names- the manufacturer just completely covered the board in lacquer....

Megasquirt uses standard 11 bit frames and 500kbps and the ALM WB uses extended 29 bit frames and 250kbps. Since the ALM WB claims to offer an easy way to change the setup, I will attempt to do this tonight.

What protocol/bitrate is implemented in rusefi at the moment?

The main reason why I had little time to play with my shiny new rusefi board just yet is because I was working on another pet project that turned out to be much more involved than anticipated: Reading AFRs via CAN bus on my Megasquirt. If you're interested, you can find my thread on the subject on M...