Converting a CY70 Clark forklift to diesel

[fernballan]

I am in the process of converting a CY70 Clark forklift to diesel with a vw engine
Many adapters and different bolt patterns
But I have another problem
My Clark C500 LPG forklift starts and runs fine at idle but once you press the gas pedal it starts to run rough
Sometimes it runs fine but the last bit on the gas pedal it starts to run unevenly
Anyone have any ideas
Robert

 

[fernballan]

 

[fixit]

The LPG truck problem is probably in the gas regulator where the LP is converted to vapor.

fixit

 

[Martin W]

I mis read the question. Sorry

 

[ddillman]

I would also check the regulator. I have taken them apart and they get a tar like substance build up in them.