Quote:
Originally Posted by darcane
What's the scoop on this freeware ECU tuning?
I've looked at a service to reprogram the ECU for my '03 Silverado. One that caught my eye claims 1-3mpg improvement (Not much on a Prius, huge on a full size truck). The thing that has stopped me is cost. $200+ for a mod that may or may not improve efficiency. A free utility to play with sounds interesting, but you still need a ECU -> PC interface of some sort...
Mike
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You are more or less completely and utterly on your own is the scoop.
Those services may or may not work and the price is obviously not very good.
The megasquirt and other options that are controlled by you are also not real cheap.
If you do it yourself completely you need to understand the binary portion of the rom, how to make it into a human readable thing, how to identify its parts and how to modify it.
Generally you will also need a computer, a soldering/desoldering iron, nerves of steel *******izing and putting a socket in your ECM and a ROM reader for the PC.
I failed when I tried that route so I am little help, also remember each vehicle and motor varient has its own club and potential utilities, a google search might help.
Oh and if you do it yourself it voids any warranty you may have.
Cheers
Ryan