Poor Performance, Black Smoke, Low Power
CAUSE ACTIONImproper fuel Drain fuel tank, flush system, fill with proper fuel for conditions. Refer to owner's manual
Air in fuel system Bleed fuel system
Intercooler internally blocked or leaking Check pressure drop across intercooler. If pressure drop is more than 4 in. Hg, clean or replace as necessary
Restricted or blocked fuel injection lines Remove restrictions or replace lines
Incorrect injection pump timing Adjust injection pump timing
Restricted or damaged injector nozzle Repair or replace as necessary
Clogged or restricted air filter Remove restrictions or replace filter if necessary
Air fuel control tube leaking or broken Repair or replace as necessary
Low manifold pressure Check and repair turbocharger operation
Injection sequence does not correspond Install fuel injection lines in
with firing order correct order
Low or uneven engine compression Repair as necessary
Injection pump to engine timing Check injection pump to engine timing
Fuel injection pump malfunction or Replace fuel injection pump
not adjustable