peugeot 306 rough running

[froggy]

Hi, my peugeot 306 is running rough when warm. when cold , it runs fine, anyone any ideas where to start? cheers Terry.

[PaulC5]

You can look for anything obvious around the engine but a diagnostic is needed to check for anything else. Also provide details of your car - year, engine and if you get any fault codes the VIN will help.

[froggy]

306 Meridian, 1.4 petrol, many thanks.

[CitroJim]

Terry, do indeed point a Lexia at it and do a diagnostic on the engine ECU as Paul advises..

Potential causes are a duff coolant temperature sensor or a duff oxygen sensor but without a Lexia session you're staggering around in the dark...

Has the fuel consumption significantly risen? Does the exhaust smell a bit rich and of petrol fumes?

[froggy]

Hi Jim, yes it does smell rich, cheers Terry.

[CitroJim]

Hi Jim, yes it does smell rich, cheers Terry.

Give the Coolant Temperature Sensor a try Terry, they're not expensive and hopefully it'll resolve the issue.. It's my hot favourite to be the cause... (no pun intended )

[froggy]

cheers Jim

[froggy]

there are three sensors, one blue, one green, one brown, wondering which of the three, the coolant temperature sensor is? cheers Terry.

[CitroJim]

The green one sir! Blue is for the gauge/overheat/engine cooked light and the brown one is the A/C Bitron Sensor...

[froggy]

Cheers!!!!