93 Audi 100 2.3E hot engine won't start
 

I have a problem with my 93 audi 100 2.3E. The problem is that it wont start when the engine is hot. I have changed the Lambda sond and the temperature sensor "thingy"(not sure what it's called) that is locatede under the termostat on the cooling intake. I tried to unplug the cable on the temperature sensor "thingy" and then the engine started without any problem (hot or cold).

Also before i changed the temperature sensor "thingy" i had to pump the gas pedal when starting the engine, and this problem disappeared when i changed it...

Can anyone help me with this please????