Idle too high. How do I adjust

[Bruce]

Here's another idea.
Comparator off of TPS,
Divide by say 100 counter off of ignition pulses.
Come off of idle and ecm sees a VSS.
Did you hook up the gear indicator (s)
Bruce




----- Original Message -----
From: "Bruce" <nacelp at bright.net>
To: <gmecm at diy-efi.org>
Sent: Monday, September 04, 2000 3:44 PM
Subject: Re: Idle too high. How do I adjust


>
> Dunno anyone that does boat chips off hand.
> The proper answer is burning your own chips anyway.
>
> Might try just leaving the IAC unplugged.
> Jump A-B at the ALDL, key on for 30 secs., unplug IAC, and then key off,
> start engine, set min idle speed adj..  Would defeat the IAC, not the best
> answer but an answer
> Bruce
>
>
> ----- Original Message -----
> From: "ZZZ Temp-Gold" <Temp-Gold at HighlandsIns.com>
> To: <gmecm at diy-efi.org>
> Sent: Tuesday, September 04, 2001 3:21 PM
> Subject: Idle too high. How do I adjust
>
>
> > I have repowered my boat with a '90 rv tbi 7.4. It has a 747 ecu and
works
> > nicely, other than the idle. The boat likes a 500+/- rpm idle and it's
> > currently idling at 800. What can be done to adjust it? (Ive tried
backing
> > off the butterfly, and this seems to help, until I restart the motor and
> it
> > goes back up to 800 again.) If reprogramming is the only solution, Id
sure
> > buy an 'adjusted' chip.
> >
> > Also, it pulls up to 4200 rpm. Is this the upper limit of the motor? It
> > seems reasonable, just curious.
> >
> > Thanks,
> >
> > Greg Gold
>
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