Ok cheers.

I will get a price for that (along with door seals :censored:)

I removed the restricor pipes in my astra's airbox and many vauxhall owners do the same (also in the corsa but dont know of any others) and it pulled a bit better, but this i havent noticed any difference (maybe beacuase of sucking in hot and cold air at same time), just lets a bit more air through as the one nearest the air filter has opened up a lot of space
 
Hi guys I had the same problem with mine, so I thought I let you know what was wrong with it for anyone else who was reading this like I was!

Thought I would let you know I have sorted the issue out. It was the Crank Shaft Sensor (known also as the Speed Sensor).

Parts I changed trying to solve my issue in hand;

1. Spark Plugs (£20 part £0 fitted myself
2. Spark Leads (£60 part £0 fitted myself)
3. Coil (£50 part £0 fitted myself)
4. Injectors (Not sure :s)
5. Fuel Filter (£10 Part £0 labour)
6. Temperature Sensor (£15 part £0 labour)
7. Crank Shaft Sensor (£90 part £10 labour) <<<< fixed the problem

But thank you adam for helping me. Did great things this fourm did kept me going !! :D