Section 08 ENGINE MANAGEMENT (4-TEC)
Subsection 02 (COMPONENT INSPECTION AND ADJUSTMENT)
FUEL DELIVERY
4-TEC FUEL DELIVERY SYSTEM DIAGNOSTIC FLOW CHART
Repair or
replace
Replace fuel
pump module
FUEL SYSTEM OK
Retest
Replace fuel
pump module
Connect safety lanyard
Fuel pump does not run
Fuel pump runs
for 2 sec. then stops
Install fuel pressure gauge
on fuel pressure line
Check fuses.
Check safety lanyard connection.
Check fuel pump operation.
Repair or replace if necessary.
Fuel pressure is
303 kPa (44 PSI)
or 399 kPa (58 PSI)*
Fuel pressure more
than 303 kPa (44 PSI)
or 399 kPa (58 PSI)*
Fuel pressure less
than 303 kPa (44 PSI)
or 399 kPa (58 PSI)*
Perform fuel pump test
Check fuel line/
rail for leaks
Fuel pressure less
than 303 kPa (44 PSI)
or 399 kPa (58 PSI)*
Fuel pressure more
than 303 kPa (44 PSI)
or 399 kPa (58 PSI)*
Check fuel
injector
Fails
Connect safety lanyard
Fuel pump runs
Fuel pressure is
303 kPa (44 PSI)
or 399 kPa (58 PSI)*
OK
OK
Yes
No
Check
fuel line/
rail for leaks
Repair or
replace
OK
Fails
Perform fuel
pump test
OK
Fast
pressure drop
Verify fuel
pump check
valve
OK
Fails
Fails
OK
Fails
* Supercharged  Inter-Cooled Models only.
Crank or start
engine
R1503motr353S
smr2004-Complete Line Up 411
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