Hot running issue on Reliant Scimitar 6a

[Madfox]

Help! New car, ran fine for 80 miles on motorway. Started fine today, drove for 30 mins then started running rough and stalling. Ideas anyone?

[Madfox]

It runs really well, but after 30 mins in traffic starts idling rough and them needs lots of revs to keep it going. Stalled a few times but starts ok again. It's fitted with a weber carb and electronic ignition. Anything else that would help?

[Madfox]

TooMany2cvs said:

Starts immediately or needs a bit of churning? What's the fuel pump on it, and where?
Is there an inline filter you can see?
Manual or automatic choke?
If manual, what happens if you pull it out a bit?
Have you actually given it a basic service yet?
Idle speed?
What's the temp gauge doing?
Electric fan? Working?
Any fluid loss?

Starts pretty quickly, little churning
No inline filter I can see
Manual choke, haven't pulled it out when experiencing this issue
No, not done a basic service. I think it's been a while that ignition consumables have been attended to
idle speed is about 800 rpm
Temp stays solid - head gaskets are fine; were changed less than 10,000 miles ago (about 6 years)
Electric fan is working; it works off a thermostat and has a manual override which I kept switched on today
no fluid loss. Engine is tight as a drum

[Madfox]

Oh and it has electronic ignition

[Madfox]

It's a Ford pan filter