I have an Audi a3 2006 1.9 tdi I have a very strange problem when car is cold it start perfect but when engine is warm like hot it just seems to struggle I know it's not flywheel or clutch as they have recently been replaced can anyone help?

 

There are other tests you should do to prove this.

Sounds like a bad head gasket.

One possible test. Run it let it heat up. Stop it remove spark plugs and injection wires to stop fuel.

Have an assistant turn the car over. Look for mist out the plug holes.

Does one of your plugs have a odd color be the others.?

Fuel pressure problem?

Sorry I gave you a gas motor test.

Temp.sensor is messed up? So the cold start process doesn't happen correctly...

Any. Codes

 

I have two fault codes which are 05661 and 05659 does this help you?I don't think it's head gasket I'm thinking it's more a temp sensor just not sure which one does them fault codes help thanks for your reply

 

those dont sound like valid codes...

although they could be...


i think they are normally 4 numbers long?

otherwise google them with audi fault codes

 

follow this link here to the bently publication...


http://www.bentleypublishers.com/tec....dtc.table.htm

hence my confusion with your codes.