hello ,
i believe that the sc's have a
" cold start switch " which is located
on the left side of the engine up against
the fire wall .
                            dick

If you kept the original CIS injection when you installed the 3.2 engine (a
3.0 is standard), then there is a warm up regulator and it may well be the
culprit.  If...when the 3.2 engine was installed, they used the newer Bosch
DME system, the problem could be several things.

I'm betting you've still got the CIS system...so you can "guess" and buy the
part, or you can go to a good independent shop and let them test it.

Your $$$, your choice.

Good luck...

Hi

Thanks for the feedback.

The 3.2L is a complete transplant including the DME fuel injection system
from a 1985 Carerra.

Sooo, the fault I am chasing is going to present in any 1984 - 86 Carerra.

At a guess I thought it would be a temperature sender or warm up regulator.
When cold it starts fine and idols at about 1100rpm. Just doesn't want to
sustain idol when you drive or 'blip' the throttle before it is well and
truly at operating temperature.

Before spending dollars and time I thought I would ask the cast of
thousands on this news group to see if the fault was common.