Hi there I have a MKIV Spitfire with a problem I cant seem to diagnose.
When I'm out driving around and pull up at a junction or roundabout every now and again the idle will drop to around 500rpm, next junction or roundabout and the idle is fine at 850rpm.
At 1st i thought it was a old coil as it was very warm to touch but changing that has made no difference, also as part of its yearly service i have changed the HT leads, plugs, rotor arm, dizzy cap and fuel filter.
Has anyone else every come across this?