Startproblem when hot

Hi,

My laguna (1997 1.8 RN LPG) takes a little time to start after you have been driving a little. You have to keep the startermotor running for 10 seconds. Then it starts, and it always starts luckily.
Starting when cold is no problem, however i am not looking forward to the summer...

Could it be the Petrol-pressure sensor?
If so, is it true that i have to dismantle timing-belt-casing before i can reach it or is there an easier way?

thanks

i have the same problem...with my 1995 2.0 rt. when i start driving the water temp gauge doesn't even move..then after 30/50 mins it'll shoot up near the top and light up...then if i turn the engine off for a period of time and try to start the car ..it wont!! the temp needle never goes right to the top so it shouldn't be a over heating problem...?..i have to wait 10 mins for the needle to move down slightly then it starts... whats the "10 second,stater motor" thing u speak of?