VR Statesman stalling??

[emmtee83]

Hey guys, hoping someone has experienced my problem.

I am running dual fuel, have no problems running the car on gas. When running on fuel, the car stalls.... she'll start up, gets to about 1500rpm then shuts off. one thing i did notice however is that i get an engine warning light when i run on fuel, but it disappears when i run on gas....i have checked leads, dizzy cap, changed the coil recently....

Any ideas guys?

[emmtee83]

i did a diagnostic test, coming up with codes 12, 13, 26, 31, 41, 42, 43, 68.

HELP!!

[Jxw]

with all those fault code it shouldn't run on either.
check the earth points on the the engine, undo them, make sure they're clean and do it back up tight without twisting the lugs around and breaking wires, reset the ecu by disconnecting the battery and see how it goes, to many different systems apparently failing which makes me think bad earth.