Hey GraphiteGhost,
I finally gave in and took my car to the chrysler dealership for them to look at the car. Well it turns out after everything, the fault is all down to the LPG installation itself. Turns out the lpg installers hve installed the system incorrectly nd hve not installed the correct systme for the car with such an engine size. The chrysler people were really friendly and I got a key ringb and box of candy fter everything. I know the cost of diagnostic was a bit steep but you get wht you pay for and they had it for severl hours and wrote me letter to issue to the credit card people and lpg installers proving the problems re result of the dodgey lpg installation and it needs to be fixed. I will be getting it either removed or repaired, however whatever happens, the installers will foot the bill as it is them in the wrong. I feel so sorry for my crossfire, poor girl haha. It is either a lesson learnt not to install lpg or just use a better instller