bad idle or overheating after stopping?

[NOCTURNAL]

Umm. I have been lucky it has never happened to me.

I did remove mine within a couple of weeks of ownership but that was due to it dropping onto the engine.

There were 5 of us in the 35 degrees of Croatia and it did not happen to any of us, even after 2 days where the cars were parked up in the heat outside the hotel.

Maybe it is a drop in fuel pressure due to age or a very small hole in the system that is too small to allow the fuel to leak. (Just a complete guess)

(cool thanks Herman, dropping back from WYSIWYG editor has indeed allowed me to quote again )


Kind of my theory Andy... something must be changing/degrading/wearing out?? I have separate issue now anyway, but am still interested in the resolution to the more general issue.

Nick

[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

[WNJ516]

Would be interesting to know what fuel pressure the rail is at, and what temp the fuel rail is when this rough idle occurs. What temp does petrol boil at, to cause this vapourisation. I don't presently suffer with it but should it occur will try and take those measurements.

[Cribbit]

Suffered quite badly from this today. Did an hours drive, stopped for an hour and then had really lumpy idle. Drove for 20 mins, stopped for 20 and same again. Then drove for an hour again and stopped for 10 mins and it was fine. Whilst I do quite like the car's shake and the lumpy low idle noise it makes and the burbling when you bring the revs up with no load it's probably not generally good for the car. It does seem quite random as to when it does it, and it's more frequent since I had the kenne bell heater bolted to the top of the engine. I have no insulation under the bonnet, and plan to fit some vents if I ever get round to having some body work mods done, so will be interesting to see if this helps.