TEST
ACTION
APPLICABILITY
3
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.
Install a fuel pressure gauge to the fuel rail test port.
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
4
Within Specification
Go To
10
Above Specification
Replace the fuel filter/fuel pressure regulator.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
Caution: Stop All Actuations.
4
Note: The fuel pressure must be within specification before continuing.
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.
Disconnect the fuel supply line at the fuel rail.
Connect fuel line adapter #6539(5/16
9) or #6631(3/89) to the disconnected fuel supply
line. Insert the other end of the adapter into a graduated container.
Caution: Do not operate the fuel pump for more than 7 seconds in the next
step. Fuel pump module reservoir may run empty and damage to the fuel
pump will result.
Note: Specification: A good fuel pump will deliver at least 1/4 liter (1/2 pint)
of fuel in 7 seconds.
Turn the ignition on.
With the DRBIII
t, actuate the ASD Fuel System test for 7 seconds.
Is the fuel pump capacity within specification?
All
Yes
→
Go To
5
No
→
Check for a kinked/damaged fuel supply line between the fuel
tank and fuel rail. If OK, replace the fuel pump module.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
Caution: Stop All Actuations.
5
Turn the ignition on.
With the DRBIII
t, read TPS VOLTS.
While monitoring the DRBIII
t, slowly open and close the Throttle.
Is the voltage change smooth?
All
Yes
→
Go To
6
No
→
Replace the Throttle Position Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
309
STARTING
*START AND STALL CONDITION —
Continued