Excessive Fuel Consumption

CAUSE ACTION

Improper diesel fuel Use correct fuel for conditions. Refer to owner's manual

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 air filter if necessary

Injection sequence does not correspond Install fuel injection lines in
with firing order correct order

Intercooler internally blocked or leaking Check pressure drop across intercooler. If pressure drop is more than 4 in. Hg, clean or replace as necessary

low idle misadjusted Adjust idle stop screw

Incorrect injection pump to engine timing Adjust injection pump to engine timing

Fuel injection pump malfunction or Replace fuel injection pump
not adjustable