Hello Brian. Glad to hear that the truck is now running ok..........First thing is do not run the engine very much with the broken fan as the out of balance can damage the water pump bearing...............

The fuel quanity adjustment screw changes the quanity of fuel per injection...........I have found some that were "played" with to be so far out of adjustment that the engine would not idle down below 2500-3000 rpms..............

regards,
crossbones


1982 Luv Diesel 4X2
1982 Luv Diesel 4X4
1981 Luv diesel 4X2
1983 Isuzu Diesel 4X4
1986 Trooper TD