I have a Clark lift truck CMP 25 LP that is giving me trouble it turns on but hads a erratic idle the RPMs go up and down i cleaned out the LP regulator cleaned out the carburetor checked all vacuum hoses seem to be OK is this carburetor electronic It has a Harness going to the bottom of the carburetor base Will I have to get a laptop connected to the truck I was thinking maybe is the LP pressure sensor any help To get me going to the right direction to fix this unit