[Diy_efi] ECM question

[Shannen Durphey]

WEG1192 at aol.com wrote:

> The year is always on the PROM. If they are going to fail you on emissions
> due to the date of your PROM, they are just nit picking. 

Worse.  They're potentially failing valid calibrations.  It's not
uncommon to find factory proms with a date code of $FFFF.  Unless these
are "time travel enabled" calibrations, they have no date information
available.
Shannen

> If the ECM matches
> the engine year (1989) then the system will work fine as a 1989 system if you
> have all the emissions devices connected. If the emissions folks insist that
> your engine be newer than 1991 or equal, then you are either screwed or you
> have a lot of work ahead of you to convert the harness and all the other
> systems over to 1991 specs.
> 
> JW
> 
> >
> >  That ultimately is my question.
> >
> >  William Miranda
> 
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