Engine Misses Under Load
CAUSE ACTIONImproper fuel Drain fuel tank, flush system, fill with
proper fuel
Empty fuel tank or fuel tank vent blocked Fill tank, bleed system, check tank vent
Air in fuel system Bleed fuel system
Clogged fuel filter Replace fuel filter
Restricted or blocked fuel injection lines Remove restrictions or replace lines
Restricted or blocked fuel supply lines Remove restrictions or replace lines
Leaking injection lines, damaged lines or Replace damaged lines or tighten
loose connection connections as necessary.
Bleed fuel system
Fuel transfer pump defective Test and repair as necessary
Incorrect injection pump timing Adjust injection pump timing
Restricted or damaged injector nozzle Replace or repair as necessary
Restricted or blocked fuel injection lines Install fittings in proper positions
Fuel injection pump malfunction or Replace fuel injection pump
not adjustable