[Gmecm] TBI and EFE

[Jared Ryan]

It still idles rough after driving at 65 mph for 30 miles.  It is, 
however, sucking in air from right behind the driver-side headlight, so 
the intake air is effectively at ambient temperature.  It isn't getting 
the benefit of intake air heated by the radiator.

I am using a 195-degree thermostat, incidentally.  The ECM is a 1228746 
with an unmodified '89 9C1 Caprice 350 chip.

I'll see if resetting the minimum air helps any, but after your response 
and Rick's I bet I need that heat stove to make it run sweet.

On Fri, 1 Dec 2006, Terminal Crazy wrote:

> On 01 Dec, Jared Ryan <jryan at caminofx.org> wrote:
>> I just did a little reading on carburetor icing - perhaps it is
>> happening a little bit, even though the ambient air is above freezing.
>> Hmmm.
>
>> I notice that it starts instantly cold and runs pretty well overall.
>> It's  just a rough idle when it has warmed up that is bothering me.
>
> My '78 305 & 350 had a Holley 600cfm with the choke mechanism removed and a
> aluminium street scoop. In cold damp weather, it would idle / drive rough
> if driven straight away for upto 20 minutes or so. Letting it idle for 3/4
> minutes then stopping it for a  minute always made it run sweet. I always
> attributed this to carb icing but never actually knew if this for sure.
>
> -- 
> Mitch - 1995 Z28 LT1 M6          terminal_crazy at sand-hill.freeserve.co.uk
> Lancashire England          http://www.sand-hill.freeserve.co.uk/terminal_crazy/
>
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