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What free software is available for my ECU? Here you will find links to lots of programs available for editing or hacking the Honda ECU.

http://www.PGMFI.org (Official home of the hacked Honda ECU) has brought together some of the best minds in ECU hacking and coding. From this great place, free DIY engine management solutions have come about, and are running vehicles around the globe. Some of the free software applications available are.

Uberdata by Blake Warner - http://www.ecimulti.org/uberdata (Honda OBD1)
TurboEDIT by Jason Parker - http://www.TurboEDIT.org (Honda OBD0)
ECUControl by Nick Mailloux - http://www.ECUControl.com (Honda Datalogging OBD0 & OBD1)
Crome by John Cui - http://www.radicalperformance.com/download/ (Honda OBD1)
ZControl by Mike Robichaud - http://www.ZControl.net (for Nissans)

3-2) Can my ECU be chipped?
As far as the more common Honda ECUs:
OBD0: 90-91 PM6, JDM PM7, PR3, PW0, 90-91 PR4

What about 88-89 ECUs? Well, there are two ways of going about this. Get an adapter for your ROM burner, or a burner itself that will burn 40-pin 8051 MCUs, or, you can make a simple "daughter board" for your external EEPROM from parts from RadioShack. These schematics tell show you exactly how to make them. Users have had good results with them!

http://www.pgmfi.org/~jparker/host/OBD0_romadaptor.zip
http://www.pgmfi.org/~jparker/host/OBD0_romboard.zip

OBD1: Any of them (some more work than others, some have more potential than others)
OBD2/2.5: None.

(If I missed important ECUs let me know, or if I got osmething wrong, let me know)

3-3) What do I need to do to "chip" my ECU and burn ROMs?
In general, you need a "chippable ECU" (refer to 3-2), a ROM burner (refer to 3-4), EEPROMs (27C256 UV erasable? 29C256 electroniclly erasable) and Engine Management Software (refer to 3-1).

Honda OBD0 (External EEPROM) Chipping Process: (Supplies: Soldering iron, Desoldering braid (or other means), 28-pin ZIF or Lo-Profile Socket)
1) Using a soldering iron/desoldering iron of your choice, locate the external EEPROM, and desolder all 28 pins from the PCB. CAREFUL: There is protective gel over the chips and needs to be melted otherwise, you'll tear a trace under the chip. If this does happen, patch with a jumper wire.
2) Insert ZIF or Lo-Profile socket, and solder socket in. ...all done.

Honda OBD1 Chipping Process:
1. Desolder all holes for the components.
2. Solder in a 28 pin socket. (Empty footprint)
3. Solder in the 74HC373. (Empty footprint)
4. Solder a 1.1K ohm resistor into R54 location marked in white lettering (not needed on P72 USDM GSR) (Note: 1K - 10K resistors seem to work ok. This is a simple pull up/pulldown resistor. 1K resistors seem to work well with ROM emulators that have trouble with 10k resistors)
5. Solder in two 0.1uF ceramic disc capacitors into C51 and C52.
6. Solder in J1. This jumper can activated by utilizing an unused resistor lead or extra section of spare wire.
7. Insert the 28 pin DIP PROM in the proper orientation and start the car.

Notes: Caution: If you plug in an EPROM or EEPROM backwards it will overheat and erase or damage the device. If you are getting an error that was not there with the stock ECU, write the appropriate stock .bin file to a blank chip and install in your ECU. If there is still an error, there may be a soldering problem. Cut J1 to return the ECU to stock.
(Information by Fabrik8, from PGMFI.org FAQ)

3-4) Which ROM burner should I buy?
This choice is up to you. There are a lot of affordable options out there. Some are limited by the different EEPROMs they can burn, others are limited by ease of use. Below are links to these different products.

Transtronics (Pocket ProgrammerII) - http://www.xtronics.com/memory/EPROM.htm
Batronix (EEPROMer) - http://www.batronix.com/electronic/circuits/eeprommer.shtml

3-5) How much boost can I run on these DIY stand alone systems?
Maximum boost is limited not by the tuning software, but by the MAP sensor currently in play. All applications that allow tuning of the fuel and timing maps, theoretically, can support larger 2 and a 3bar MAP sensors, but the degree of difficulty in tuning becomes the deciding factor. Some of the DIY management applications have 2 and 3bar MAP scaling features built in, some do not. Consult the individual application's site for futher information (refer to 3-1 for a list of applications).

3-6) What is datalogging, and what do I need in order to accomplish this?
Datalogging is the real-time capture of a vehicle's sensor information for later analysis. The use of datalogging to performance tune a vehicle, be it naturually aspirated or force inducted, has been a vital tool for many years. Several different commercial applications natively allow for the collection of this data. Hondata, Motec and Zdyne (I believe) to name a few, have this feature.

Support for datalogging is currently available is a few of the DIY Engine Management solutions available for download.
ECUControl, TurboEDIT, Uberdata (Coming soon), and ZControl all support datalogging at different stages for thier respective ECU Generations. All, however, use virtuall the same setup to accomplish this.
A TTL to RS232 converter board is nessisary to convert the ECUs stock communications protocol into a standard protocol that our PCs (and laptops) can utilize.

A link to the MAX233A (the morepopular unit, available for $23) is in the Misc Links section of this documents. Simple soldering skills are required to assemble the unit (clear, color instructions are included) and pinout instructions for Honda ECUs are available on the ECUControl website under "How to mod my ECU" ( http://www.ECUControl.com ).

This section will be updated with more info, pictures and links as they come.

Enjoy.
 

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any programs that can run on a Apple PowerBook G4
 

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question...would it be cheaper to convert my 98 civic to obd1 for tuning an ls turbo, or should i just go the hondata route?
 

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sloganish said:
question...would it be cheaper to convert my 98 civic to obd1 for tuning an ls turbo, or should i just go the hondata route?
you have to convert anyway to run hondata.
 

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:ahh everything in my research on tuning programs ecu's ect have gone nowhere...im so f-in confused, does anyone know of any faq sites with in dpeth anaylsis, 98vtec thanks for the help! i really appreciate it
 

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sloganish said:
:ahh everything in my research on tuning programs ecu's ect have gone nowhere...im so f-in confused, does anyone know of any faq sites with in dpeth anaylsis, 98vtec thanks for the help! i really appreciate it

www.pgmfi.org go to the library section and start reading.
 

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where to buy ecu already chipped?

hello i think ineed to get my ecu remapped or get it boost up cause i have a problem with my diy. well let me explain first what i done, i took the engine d16y7 sohc non vtec and bored it out to .40 oversize high comp pistons new rings bearings ,oil pump, aem fuel rail, type r injectors,obx intake with a bigger trottle body, heads ported to the max,i think thats what i could remember i did, you think i might get it to run better if i remapp? the engine wont go over 4000 revs it dies down, if i let it idle its ok, thanks for the advise
 

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I have a 92 Prelude, can I use any of those programs with the stock ECU?? And if I can where can I get a cable to connect the car to my laptop?? Thanks.
 

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I'm personally just starting to venture into this relm and this answered ALOT of question for me. Thanks for the awsome write up !!!
 

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thank you for devoting sum time to explaining this!
sure beats buying a preprogramed ecu on ebay!!
 

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i just need something so i can see the fuel curve and adjust the points at different rpms. which would be the easiest to work with?

thanks
 

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Hello my name is J.Ivanov and I am asking for some support is there some way to make the cabels homemade for connecting the ECU ?
 
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