Hi,
A friend has a 1998 Fiat Punto 75 with about 60K on the clock, quite well maintained. It has this odd fault of randomly reving whilst idling or being driven. I have seen this happen when idling with no one in the driving seat. The revs will increase to 1500 or 2000 or higher rpm, drop to normal, rev up again, etc. This will happen usually for less than a minute and return to normal. There seems to be no trigger for this - it just happens.
Has anyone seen this before on a Punto or any other similar car. This car has multi-point electronic fuel injection, an ECU, etc.
Like many intermittent faults it has a habit of not happening when you take it near a mechanic :-(.
Thanks in advance for any info/suggestions.
John.