bad idle or overheating after stopping?

[ian w]

Mine has also only just started doing it this summer. the only thing that has changed is that my cooling fan no longer runs on full speed all the time.

Ian

[colintf]

Do things run hotter due to the changes in fuel supplied at the pump now?

[colintf]

And I mean the pump at the garage not the cars pump

[LeRoiDeLaRue]

Mine does it too ... is there no fix, such as putting some slots in the bonnet, like TVR did with the Chim and after market to Griff?

[Herman]

Mine does it too ... is there no fix, such as putting some slots in the bonnet, like TVR did with the Chim and after market to Griff?

Not really.

[LeRoiDeLaRue]

Hmmm.... I had a problem on acceleration twice on return home the other day. I spoke to chap who supplied a replacement engine to a former owner and he identified a possible dodgy fuel pressure switch as maybe not responding swiftly enough on demand ... maybe it is linked?

[Herman]

Hmmm.... I had a problem on acceleration twice on return home the other day. I spoke to chap who supplied a replacement engine to a former owner and he identified a possible dodgy fuel pressure switch as maybe not responding swiftly enough on demand ... maybe it is linked?

If it is something else (or also happens when cold) it might be pump, sensor, dodgy COP or plug.

If they're all OK and it still happens it is most likely vapour in the fuel line due to heat build up. TADTS

[Julianp]

This sounds like fuel vaporization, which affects the fuel/air mixture and can cause the engine to misfire and idle roughly. I used to get this periodically with my (standard) 260 in heavy traffic in Paris during hot weather. On a couple of occasions it triggered the check engine warning light and I had to reset the codes, but it always fixed itself once the car had cooled down.
Julian.