DIY-EFI (hacking your stock ECM)

threepiston's picture

http://www.diy-efi.org/

These guys have alot of info about hacking and reprogramming your stock ECU.

In our MPG world, that means endless hours hacking and trying different parameters, to increase the MPG out of our rides. It does require some hardware and software, and I imagine it takes TONS of trial and error.

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DIY-EFI (hacking your stock ECM)

mpgmike's picture

There seems to be a pattern amongst those that actually take the big step to try programming. At first, they botch things up. Little by little, things start coming together and progress is made. After awhile, they get pretty good at it. I know one guy that did a phenominal job after about 2 months of playing, while another guy took about 4 months, but with stellar results.

Most people shy away from ideas like this because they just don't feel they can do it. I would like to encourage all of you to give it a try. It isn't something that requires "Tallent from God", just the willingness to keep at it. Just like driving a car, playing a piano, or doing what you do for a living, there is a learning curve. Some people stay the course long enough to become quite proficient at it, while others are ready to call it "good enough" much sooner.

Everybody I know that has tried it, and stuck with it long enough, has developed the knack to do quite an effective job. Give it a try.

Mike

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DIY-EFI (hacking your stock ECM)

SyntheticShield's picture

I can attest to this. I have the software and hardware to hook up to my engine computer and change more parameters than I ever thought possible. It is daunting, but you take things in little steps and before you know it you're moving around in the think like it was childs play and the things you can do in there, particularly with regards to fuel economy is staggering.

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Re: DIY-EFI (hacking your stock ECM)

qsiguy's picture

I've been tuning the ECU in my '94 Infiniti Q45 Turbo for a while now. The tuning has been towards performance and making my previously N/A engine run properly with boost. Now that I've got that close to where I want it I am going to start making some mileage tweaks. I'm working on a 7 cell HHO generator that I will be installing and then I'll start tuning the ECU.

Here is a screen shot of some of the O2 sensor tuning options I have. Of course I can tune all the timing and fuel maps as well. There are hundreds of aspects I can tune. The timing and fuel maps are easy now but I have yet to experiment with the O2 sensor adjustments. I have no doubt I can do anything I want with this ECU. Tuning is done with TunerPro, I have modded my ECU with a removable EPROM. I have just been swapping chips until now but that is a pain. I should get my Moates Ostrich 2 any day now. It is an EPROM emulator which will allow me to perform real time tuning from my laptop. The control I have is pretty much unlimited.

http://i78.photobucket.com/albums/j106/qsiguy/mpgs/94InfinitiO2sensorcon...

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Re: DIY-EFI (hacking your stock ECM)

daves66nova's picture

anyone have anything for a 96 saturn sc2? :shock:

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Re: DIY-EFI (hacking your stock ECM)

qsiguy's picture

I'm not sure. Since it's a '96 you are OBDII. I haven't done any mods to OBDII ECU's yet. All my stuff is '95 or older.

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Re: DIY-EFI (hacking your stock ECM)

fury fan's picture

qsiguy -
Have anything for the Ford 5.0HO, 1988 vintage?

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Re: DIY-EFI (hacking your stock ECM)

daves66nova's picture

what about for a 92 honda accord or an 86 toyota carb'ed truck?

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Re: DIY-EFI (hacking your stock ECM)

krmusher's picture

Can your equipment program an 87 subaru GL10 Turbo, multiport injection with knock sensor?
I've been modding my sensors and finally have the CEL on. I'm pretty sure my OBDII scanguage 1 is not applicable?

I may end up using a PWM controller on the injectors to simplify...?
All comments welcomed. :D

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Re: DIY-EFI (hacking your stock ECM)

t120r's picture

The ford mustang can be hacked into by using a Tweecer. But it would be nice to know a way to get into the EEC and reprogram it without a Tweecer.

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Re: DIY-EFI (hacking your stock ECM)

daves66nova's picture

daves66nova wrote:

what about for a 92 honda accord or an 86 toyota carb'ed truck?

bump

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Re: DIY-EFI (hacking your stock ECM)

FUELMIZER's picture

HI ... the

Quote:

tunning for millage

) info has been real helpful to me ....and doing the mods . one at a time is ok map.tps, ect for me i had to get them all about 6 i think ...sure been a hassle to see the fuel effiency come into play......seems like the latest cars & trucks have their own what i call fail safe antilean out systems..... still if the engine gets too hot i read it designed to add more gas to keep it at a factory set cool perminters......still learning this since april ! some you guys know your stuff..i thank you ... oh and the scanguagell is a must for monitoring the 02 status..keeping it in cloosed loop mode..as well as the outher censors...now if you have access to some verry expensive shop equiptment and know your stuff ..... well i dont!. for me it like starting kindergarden school..... thats where this forum is soooo helpfully......as mentioned already......

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Re: DIY-EFI (hacking your stock ECM)

mpgmike's picture

daves66nova wrote:

daves66nova wrote:
what about for a 92 honda accord or an 86 toyota carb'ed truck?

bump

For the Honda, try Hondata. I'm at a loss for the Toy.

Mike

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