Chrysler 1991 - Page 113

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DIESEL FUEL INJECTION SYSTEM DIAGNOSIS
i
SYMPTOM
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CAUSE
ACTION
Enf In© surges at Idle
Fuel injection pump malfunction or
not adjustable
Replace fuel injection pump
R0V9h Idle ififten engIn® Is i^wia
Improper fuel
Air in fuel system
Drain fuel tank, flush system, fill with
proper fuel
Bleed fuel system
Low idle speed
Adjust idle speed
Injection pump rear support bracket .loose
Repair as necessary
Restricted or damaged injector nozzle Repair or replace as necessary
Injection sequence does not correspond
with firing order
Install injection lines in correct order
Low or uneven engine compression Repair as necessary
Fuel injection pump malfunctioning
or not adjustable
Replace fuel injection pump
Engine misses under load
Improper 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
Heed 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
bose connection
Replace damaged lines or tighten
connections as necessary.
Bleed fuel system.
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