Valver idle problem

[Rich_16v]

This is the scenario...

The car always starts fine doesn't matter if its hot or cold and it always idles fine when cold, if the car gets up to full temperature then i go back to it say half an hour later its still 'warm' but it will idle lower (700rpm) than normal (900rpm). It only idles lower than normal for as long as it takes the car to near enough reach full temperature again, then its absolutly fine. It never cuts out or stalls so its not a major issue but its simply annoying me. It never used to do this its only started in the last couple of weeks.

Any ideas?

Thanks

 

[Tom_16v]

Another Valver....another idle problem lol!

Could be a million and one things mate!

ISCV

Lambda Sensor

Leads, Plugs, Dizzy Cap or Rotor Arm

There are more but I can't think right now lol, I'm sure someone else will say.....

 

[BRUN]

coolant temp sensor is another common one........

mine sometimes idles like this after an ECU reset/battery off, but after a few hours its fine