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Page Title:
ENGINE RUNS ROUGHLY, MISFIRES - continued |
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 TM 10-3930-673-20-1
6. ENGINE RUNS ROUGHLY, MISFIRES (CONT).
2
KNOWN INFO
TEST OPTIONS
High pressure fuel lines OK.
Visual inspection.
Is fuel system free from air in
POSSIBLE PROBLEMS
REASON FOR QUESTION
fuel lines?
Air in fuel system.
If air is in fuel system, engine will
Fuel contaminated.
not run smoothly.
Check fuel flow and
NO
bleed system as
necessary (Para 5-11).
YES
3
KNOWN INFO
TEST OPTIONS
High pressure fuel lines OK.
Visual inspection.
Is fuel clean and free from
Fuel system OK.
REASON FOR QUESTION
POSSIBLE PROBLEMS
If fuel contaminated, engine will
Fuel contaminated.
jerk and/or stall.
Drain and flush fuel
NO
tank and replace fuel
(Para 5-9).
YES
Refer to the Electrical
Troubleshooting Section
to solve possible
electrical problems.
2-646
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