Idle too high. How do I adjust

[Gregory A. Parmer]

> As far as connecting a VSS, Couldn't I just connect it or would I have to
> mechanically power it as well? 
> 
> I dont see the connection logically between the VSS and idle, as it idles
> perfectly, other than too high for the boat. In the vehicle, 800 would be
> very suitable. 

You could likely connect it once and give it a signal > 36 mph (isn't that
right, fellas?) to allow the IAC to reset itself, then disconnect it.
Problem is that the IAC baselines itself to certain numbers of "steps"
from being closed...then after some period of time the ECM attempts to
adjust to a particular RPM, given other parameters. Other parameters
include stuff like decel, dashpot, temp, A/C, PNRDL, etc. My car would run
at 2500 RPM for a few minutes before it idled down, and it never did make
it to true idle speed. IAC didn't know where "closed" was after I took
the TBI apart for cleaning. Sounds like you don't have that problem...yet.

If you don't have the ability to burn an EPROM, that idea of blocking IAC
and adjusting idle speed with a screw looks better and better. I won't
pretend to be anyone that is worthy of burning chips for people (can you
say engine go poof?), but if your calibration (the 4 letter code) is one
of those listed in the bin_library email me directly and I'll give it one
shot in the name of neighborly help. Today seems like a good day to offer
some of that.

-greg

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