TEST
ACTION
APPLICABILITY
11
Turn the ignition on.
With the DRBIII
t, actuate the ASD Fuel System test.
Note: It may be necessary to use a mechanics stethoscope in the next step.
Listen for fuel pump operation at the fuel tank.
Can the fuel pump operation be heard?
All
Yes
→
Go To
12
No
→
Go To
18
CAUTION: Stop all Actuations.
12
Check for any of the following conditions/mechanical problems.
ENGINE VALVE TIMING - must be within specifications
ENGINE COMPRESSION - must be within specifications
ENGINE EXHAUST SYSTEM - must be free of any restrictions or leaks.
FUEL - must be free of contamination
FUEL INJECTOR - plugged or restricted injector; control wire not connected to
correct injector
Are there any engine mechanical problems?
All
Yes
→
Repair as necessary.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
Go To
13
13
Turn the ignition off.
Warning: The fuel system is under a constant pressure (even with the engine
off). Before testing or servicing any fuel system hose, fitting or line, the fuel
system pressure must be released.
Remove the pressure test port cap at the fuel rail test port. Connect a fuel pressure
gauge to the test port pressure fitting on the fuel rail.
Turn the ignition on. With the DRBIII
t, actuate the ASD Fuel System test and
observe the fuel pressure gauge.
NOTE: Fuel pressure specification is 49.2 psi +/- 5 psi (339 KPa +/- 34 KPa
Choose a conclusion that best matches your fuel pressure reading.
All
Below Specification
Go To
14
Within Specification
Go To
17
Above Specification
Replace the fuel filter/pressure regulator.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Caution: Stop all actuations.
14
Visually inspect the fuel supply line from the fuel tank to the fuel rail. Look for any
signs of physical damage that may restrict the supply line.
Were any problems found with the fuel supply line?
All
Yes
→
Repair/replace fuel supply line as necessary.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
No
→
Go To
15
301
STARTING
*ENGINE CRANKS DOES NOT START —
Continued