Checks
| Action
|
DEFINITION: Momentary
lack of response as the accelerator is pushed down. Can occur at any vehicle
speed. Usually more pronounced when first trying to make the vehicle
move, as from a stop sign. May cause the engine to stall if severe enough.
|
Preliminary
|
| • | Check the PCM grounds for being clean, tight, and in their proper
locations. Refer to
Wiring Repairs
in Wiring Systems. |
|
Sensor/System
| Check the
MAP sensor operation.
|
Fuel System
|
| • | Check both injector fuses for being open. An open injector fuse
causes four ignition coils and four injectors not to operate. Replace the
fuse. Inspect the ignition coil circuits and the injector circuits
for an intermittent short to ground. |
|
Ignition
System
|
| • | Wet down the secondary ignition system with water from a spray
bottle. Wetting down the secondary ignition system may help locate damaged
or deteriorated components. Look/listen for arcing or misfiring as
you apply water. |
| • | Remove the spark plugs and check for the following: |
| • | An improper spark plug gap will cause a driveability problem.
Do the spark plug gapping using a wire gauge gap tool (J 41319).
Refer to Spark Plug Replacement. Determine the cause of the fouling
before replacing the spark plugs if spark plugs are gas or oil fouled.
Refer to
Fuel System Diagnosis
for
diagnosis the rich condition or for diagnosis of the oil fouling condition. |
| • | Check the spark plugs for proper heat range. |
|
Engine
Cooling System
| Check the engine thermostat for proper operation and for proper heat
range. Refer to Engine Cooling.
|
Additional Checks
|
| • | Check the generator output voltage. Repair the charging system
if the generator output voltage is less than 9 volts or more than 16
volts. |
|
