Nissian Model MDL02A25LV Serial DL02-9H3364. Anyone worked with the fuel system on this truck(LP)? Checked it out and the engine would surge up and down while driving it. Found the ar filter was completly plugged, took that out to see if it would run ok and would rev up ok, gave it back to the guy to test drive and it acted up again without the air filter in it. It's got a lot of sol.'s on the throttle body. Any help would be appricated. Have a good day.