I saw CliffyK had a write up on these. Do they really work as good as the ones you buy?

Jay

 

There's no difference from the ones you would buy

 

The circuit I published is the same as all commercial MIL eliminators I have seen, however...[/align][/align]The technology used in the simple RC network MIL eliminator may not trick newer ECUs. [/align][/align]The RC network reduces the voltage of the rear sensors and shifts the output signal's phase a bit vs. the front sensor's signal, but that may not be enough to fool the more sophisticated ECUs that look for switchingfrequency variations in the front vs. rear O2 sensor signals. [/align][/align]This is why some folks report them (MIL eliminators) as being "junk" and a "waste of money". My experience has been that on most pre-2001 cars they will work fine, on late 2001 to 2004 cars you've got a 50/50 chance, and on 2005+ cars they probably won't work--store-bought or DIY...[/align]

 

SFTS (Sorry for the Stupidity)

What's MIL??

[]

 

Malfunction Indicator Light (or Lamp); aka SES, Service Engine Soon; CEL, Check Engine Light

 

Can't we just call it the "idiot light" like the old folk do?

No, it's the SDLTMSB.


(Small Dash Light Telling Me Something's Broke)

 

It's a little more than the idiot light nowadays, but not much

I made MIL's for my 04, work fine. Made MIL's for a friend's 00 v6, didn't work. For the price, and a couple hour's worth of time, why not try...?

 

[/align][/align]That's my feeling, if someone doesn't have $400 to spend (or want to spend) on a tuner then for $5 give it a shot...[/align][/align]The switching frequency differential monitoring takes a relatively sophisticated and powerful ECU, and my experience has been that even though some say they are doing so (Ford's EEC-V does) I suspect they also lend some credence to a nice low voltgerear sensoroutput that's also out of phase with the front signal--those that do this will be happy with MIL eliminators, those that insist on a frequency difference won't.[/align]