Chrysler 1991 - Page 114

— FUEL SYSTEM 14 - 17
f SYSTEM DIAGNOSIS
CAUSE
ACTION
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 proper positions
I Fuel injection pump malfunction or
Replace fuel injection pump
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
Control lever not going to full throttle
position
Adjust throttle linkage
Clogged fuel filter Replace fuel filter
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 supply lines Remove restrictions or replace lines
Injection pump overflow fitting switched with
inlet fitting
Install fittings in proper positions
leaking injection lines, damaged lines or
loose connections
Replace damaged lines or tighten
connections as necessary.
Bleed fuel system
Incorrect injection pump to engine 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 broken or leaking Repair or replace as necessary
Low manifold pressure
Check and repair turbocharger operation.
Check intercooler and air pipes for blockage
Injection sequence does not correspond
with firing order
Install fuel injection lines in correct
order
Low or uneven engine compression
Repair as necessary
J Restricted or blocked fuel injection lines
Remove restrictions or replace lines
Incorrect injection pump to engine timing Check injection pump to engine timing
(
Fuel injection pump malfunction or I
not adjustable j
Replace fuel injection pump
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