amb@bronze.lcs.mit.edu (andrew m. boardman) wrote in
news:e8bhrc$13nt$1@grapevine.csail.mit.edu:

>
> The short version: What, on an '89 DPFI 1.5l engine, does the ECU use
> to determine target EACV opening and idle speed? What would cause the
> ECU to suddenly decide to command a full-open EACV without also
> indicating an error?
>


You have a giant air leak.

I don't know if you have a Fast Idle Valve, but on multi-port cars this is
the prime culprit.

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TeGGeR®

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/