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This gets down to architecture. Implicit in a lot of what you are doing is a model. Many ECUs use incredibly simple models. Many use incredibly complex ones, sometimes unnecessarily so. Most of the time this ISN'T something that end users or people tuning ECUs think about in the forefront of their m...

possibly. VCT is often more subtly complex. It's an example of where you typically need closed loop systems (PID) to achieve and maintain targets. remember the "classic" structure: 1. table(s) to generate targets 2. open loop table(s) to establish baseline 3. PID closedloop actions to stee...

Honda's injector supplier (Keihin) didn't have a saturated injector when this was made. Or they had a ton of the older P+H injectors left in inventory. In any case, the resistor box on the injectors serves as a current limiting job to allow the injector drivers (NPN Darlington arrays, 2 inj per arra...

If you go with a Honda, stick to manual trans. IMO.

i don't know that much about Honda V6. They're not very popular with the enthusiast community, at least not until later engines.

92-98 have separate TCM for integra, Accord, Prelude
92-00 Civic (simpler trans) are integrated into ECM.
01+ pretty sure all the TCMs are integrated onto the ECM.

remember in our discussion the suggestion of "dma" inputs and "dma" outputs? -Hardware inputs moved into variables -Hardware outputs set from state of variables -Control logic in middle simply manipulates variables How does this work on a practical level? unsigned char ECT_ADC; /...

Rather than keep implementing specific functions (i.e. fan control) it seems like it would be a good idea to implement general purpose condition driven I/O. This is done on many other systems and is a great way to implement features in a generic way so that the same code instance can be called with ...

Saab have a small but loyal following. They do a lot of weird stuff. One of the few to use ion sensing in a production vehicle. Not sure how I'd feel about going after that. Same deal with Volvo... Small but loyal. Much like Saab, extremely small group of enthusiasts doing mods that would require a ...

Suggestions: 1. Miata. Huge community, relatively large installed base, decent support from Megasquirt already, fledgling ROM tuning stuffs starting to trickle into existence 2. VW gasoline. Think VR6, 20V 1.8T, pre-GDI stuff. Decent size community where at least ok drivetrains have stunted performa...

If you want a walkthrough/comparison of some common engine management systems and their (subjective) pluses and minuses, hit me up. I have (literally) hundreds if not thousands of datalogs and tunes from various real vehicles. Sometimes it's really handy to see some of the data analysis / mechanics ...

There are several coils that I use on just about everything that have built-in ignitors and can be driven at logic level: 1. Denso coil sticks. 01+ Honda K/J/D series, Toyota 1zz/2zz, ... ... Very common well-constructed coil made by denso. Typically happy between 2.5 and 3.5ms of dwell depending on...

Might as well add some spark gaps... They're handy as a first line of defense.

.lbr isn't an allowed extension so I can't upload the library of cookie-cutter spark gaps I use. I can email you my eagle library if you want, but I don't do kicad yet.

Dude, your information is wrong. OSHPark manufactures all their PCBs here in the US. They may use some packaging made in China, but the PCBs are all USA. The guy that runs it is a huge proponent of open source hardware and developing manufacturing here in the US. Double check before spouting off nex...

While I respect what Honda's programmers were able to accomplish (an ECU that would run an engine comfortably to 10,000 RPM in 1992 with a 10Mhz MCU and a well-designed ASIC), hardware is now cheap. The only conceivable motivation for doing pulsewidth or reqfuel lookups directly off RPM and MAP is s...

I've spent hundreds of hours doing disassembly on 88-05 Honda systems. I did some quick looksies on my 85 CRX. I know that there was stuff before it but the PGMFI system that grew out of their F1 efforts is what I've sunk my teeth into and can speak more about. :mrgreen: You can most definitely tell...

I've had to tackle the issue of VR sensor simulation for a commercial product that I helped design. Before you get too brainiac about this, it pays to examine what the "detector" circuitry is inside the ECU. In almost all cases, VR sensor interfaces boil down to zero-crossing detectors tha...

This is basically how early Honda (~1988-2005) systems worked. It's kind of ghetto IMHO. These MCUs were typically 8 - 16mhz and lacked FPUs. Having worked with more modern algorithms that divorce fueling from airflow (i.e. semi-proper SD, MAF, SD-MAF mix, AlphaN-SD-MAF mix, MAP-compensated Alpha-N,...

IMHO, I would wait. Kickstarter IMHO is most useful for advertising. It's useful for taking something that is ALMOST a product and reaching a much broader audience with it than would be possible otherwise without a HUGE advertising budget. Coupled with a social media campaign and maybe some targeted...

I've used CD4050 hex buffers with good success for this kind of thing. They're cheap (<$0.50 in single q.), relatively fast (5-20ns propagation delay), tolerant of up to about 18V on inputs (CMOS logic!) with a 3.3V or 5V supply, depending on the silicon you get. Not exactly elegant, but it works gr...

I'm going to try to answer the question: "Why do we not have more cars running on rusefi?" First, I'm going to answer personally why one of my cars isn't running on it. Then I'm going to tackle the more general case. Personally: -I have no garage for my personal cars. I have a dyno and a s...

I vote for this too... bolt the board to a case, pour with epoxy. It makes the whole affair somewhat of a throwaway piece in the event you blow something up, but it's a great inexpensive way to make something waterproof. Plus a lot of the decent connectors (MX123, MX150, AMPSEAL, etc.) come with ver...

I'm relatively fond of the Molex MX123. They're the OEM connector on the GM E38/E67 (and maybe more?) controllers so the volume is there for them to be relatively inexpensive. i.e. http://www.findchips.com/search/0313862001 $4.75 PCB header http://www.findchips.com/search/0345760703 $14 terminal 5ce...

Not to be too terribly rude here, but you guys really don't have any idea how effective engine management works. :) The whole MAF load thing is a big question. You might know how much air you have with a hotwire sensor but coming up with a load value is more tricky. -Ford normalizes the value to &qu...

AFAIK, the progression from EECV to Oak/PPC: 2003: 6L diesel 2004: ETC Trucks 2005: ETC Gas cars i.e. mustang Basically, as the vehicles went DBW/ETC they went to PPC. Then around 2010, some the F150 started moving to Tricore. GT500 in 2010. Mustang with new 5L in 2011. Diesel with 6.7L powerstroke.

I have schematics from an m+w pro14 I took apart several years ago. Not much to a cdi except quality components.
Dave

On a side note - for a long time, I've wanted to go down this path. (Custom OS for OE ECU) Why? It is growing increasingly difficult to reverse engineer these things. The sheer volume of code and complexity of systems is increasing fast. Eventually, reverse engineering just isn't going to be a viabl...

I have access to flash tools for 96-2014 Ford, GM OE computers. I have raw binary access to most of them. Trust me, reverse engineering this shit is a lot of work -the newer GM E38s use 2Mbyte of flash. The newer Fords use closer to 4Mbyte

ya, I was right... http://commons.wikimedia.org/wiki/File:PPC-ECM.jpg from wikip: "Delphi Corporation use either the MPC561 or MPC565 in the engine controllers they supply to General Motors, with nearly all 2009 model GM North America vehicles now using an MPC5xx in the engine controller. Bosch...

AFAIK, GM was deep into the MPC56x stuff too... Pretty sure the E67 and E38 ECMs (think: 2006+ V8 car/truck) are MPC based.

There are many generations. Ford has codenames for each of them. Gas vehicles up to 2004 used a 8096 derivative. (amazing, eh?) Diesels in 2003 started with a PPC derivative. Gas vehicles in 2005 started to transition to a PPC derivative. I'm pretty sure Motorola/Continental was the primary vendor f...