[Diy_efi] Slow decay on idle on startup

[Steve Ravet]

> -----Original Message-----
> From: diy_efi-bounces at diy-efi.org=20
> [mailto:diy_efi-bounces at diy-efi.org] On Behalf Of David M. Ingebretsen
> AMC 258 inline 6 (1990 Jeep Wrangler)
> 1227747 ECU (Howell kit)
> Baseline EPROM is the ATKX stock
>=20
> I have studied the online documentation and tips at the=20
> DIY-EFI site as well as the book from Custom EFIS, the=20
> calibration help from TUNER CATS software.
>=20
> On startup, the idle is very high ~1500 RPM, and the IAC is=20
> retracted about 60 steps or more. The idle does not drop to=20
> normal levels unless I come to a complete stop for about 30=20
> seconds after driving for about a minute or so. The engine=20
> does not have to be hot or even warm I just have to drive for=20
> a bit then come to a complete stop.
>=20
> I have adjusted the O/L idle on/off RPM, the IAC v. temp=20
> tables, the IAC kickdown delay timer and kickdown steps, min=20
> temp for closed loop, and other timers to no real effect. The=20
> paper describing the IAC operation was a good resource but=20
> didn't give me any better clues.

Do you have the VSS hooked up?

--steve


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