CGT stalling when cold, I'm baffled

[auditude at cox.net]

Hello,

My Coupe GT was acting strange when cold, sort of a hunting idle.  I ended up swapping
the temp sensor that is mounted on the bottom of the coolant neck on the side of the head.
It solved my problem.

Hth,

Ken

Jeroen Bruintjes brun at bart.nl wrote:
>
> I have a very weird problem with my Coupe GT (KV engine, 1985-spec,
> CIS but no O2-sensor). On cold or wet days, it starts just fine with
> a flick of the key. Idles perfectly for about one or two minutes,
> then suddenly idling speed drops to about 200, where it keeps
> seesawing. Also, it seems to lack power and misfires under load when
> cold.
>
> Cleaned the ISV. Changed it for another from the big box o' spares.
> Cleaned the injectors, checked the cold start injector. It's got new
> spark plugs, brand new plug wires+distributor+distributor cap.
> Checked the fuel pump and cleaned all contacts to sensors and relays
> around the engine.
>
> To get the picture: I pour all my money into this car to keep it in
> perfect condition, so it's not a problem of bad maintenance. I'm
> baffled! It doesn't always show this behaviour, more like every three
> or four days. After a couple of restarts, the problem is gone. I
> suspect two things: the warm-up regulator or a bad ground connection
> somewhere. Anyone? Please please pretty please?
> --
> Brun uit/uut/aus/from/de Amsterdam.
> Met een dakje op de u!
> brun at bart.nl