DFI and ECM Discuss all aspects of DFI (Digital Fuel Injection), ECMs (Electronic Control Module), scanners, and diagnostic equipment. Fine tune your Third Gen computer system for top performance.

im stupid. . .

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Old Jan 28, 2003 | 12:34 PM
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im stupid. . .

ok, what does DFI mean? I know what ecm is, but i cant figure out DFI. Also, what is prom? Is it programming? I know my brother did something with it, but i dont know what it is and does. thanks for putting up with my stupidity.
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Old Jan 28, 2003 | 05:11 PM
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From what I've seen, it stands for digital fuel injection; I could be wrong though.
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Old Jan 29, 2003 | 07:26 AM
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DFI = Digital Fuel Injection
PROM = Programmable Read Only Memory
ECM = Engine Control Module

Consider a PROM to be like the RAM in your computer. It is used to store data. The difference between RAM and PROM is that the PROM will not lose memory once the power is removed, but can only be programmed once. An EPROM is similar, but can be Erased so it can be re-programmed.
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Old Feb 1, 2003 | 08:18 AM
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Re: im stupid. . .

Originally posted by Camar92
ok, what does DFI mean? I know what ecm is, but i cant figure out DFI. Also, what is prom? Is it programming? I know my brother did something with it, but i dont know what it is and does. thanks for putting up with my stupidity.
DFI, Digitial Fuel Injection, was the first real co to offer a replacement ecm for the oem ecm. They were bought out years ago by Accel and the name term just stuck as an indicator of a non oem ecm.

Programming is the software the ecm uses to figure out what to do. It's a set of instructions. Within the programming is all the calibration data the ecm uses to figure out what values to use in instruction programming.
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