1994 GQ TB42E Problems

[Acidwalker]

Hey everyone, now I have a 1994 TB42E patrol, got 35's under 2 inch body and 2 inch suspension lift.
Parked it the other day after work and then fitted a roof basket 2 days later, went to start it afterwards to test for wind noise and while it was idling it slowly died on me.
No codes being thrown, I have already replaced all spark plugs, leads, rotor and button, new dizzy cap less than 1000kms ago, also had to replace 2 coolant pipes for the LPG, wondering if it could be related. Cheers for any help guys.
With foot flat in both gas and petrol it holds the revs at 2k for a while then sometimes revs out other times will be like I've taken my foot off, without actually lifting my foot, and then when I let it back to idle it dies.

[Dhuck]

Check the coil.

[dom14]

Rule out the electrical problems before getting into the fuel system.
Since the problem is there on both fuels, it's reasonable to assume it's electrical.