Checks
| Action
|
Definition:
The vehicle has a momentary lack of response when depressing the accelerator.
The condition can occur at any vehicle speed. The condition is usually most
severe when trying to make the vehicle move, as from a stop sign. The condition
may cause the engine to stall if it's severe enough.
|
Preliminary Check
| Refer to Important Preliminary Checks
.
|
Fuel System Checks
|
| • | Check the Throttle Position (TP) sensor for binding or sticking.
Voltage should increase at a steady rate as the throttle moves toward Wide
Open Throttle (WOT). |
| • | Check the Manifold Absolute Pressure (MAP) sensor response and
accuracy. |
| • | Check the Canister Purge system for proper operation. Refer to EVAP Control System Diagnosis (Results of Incorrect Operation)
and EVAP Control System Diagnosis (Visual Check of EVAP Canister)
. |
| • | Check for low fuel pressure after a cold start or during a moderate
or full throttle acceleration. If the fuel pressure drops below specification,
there is possibly a faulty fuel pump or a restriction in the fuel system.
Refer to
Fuel System Pressure Test
. |
|
Ignition
System Checks
|
| • | Check for faulty spark plug wires. |
| • | Check for fouled spark plugs. |
| • | Check for an open ignition system ground. Refer to Enhanced Ignition System Diagnosis (Overview)
. |
|
Additional
Checks
|
| • | Check the Service Bulletins for PROM updates. |
| • | Check the generator output voltage. Refer to Engine electrical. |
|
