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
Symptoms - Engine Controls
.
|
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 |
| • | Perform the fuel injector coil test. Refer to Fuel Injector Coil Test
. |
| • | Check for low fuel pressure after a cold start or during a moderate
or full throttle acceleration. |
|
Ignition System Checks
|
| • | Check for damaged spark plug wires. |
| • | Check for fouled spark plugs. |
|
Additional Checks
|
| • | Check the Service Bulletins for calibration updates. |
| • | Check the generator output voltage. Refer to Chargine System Test
in Engine Electrical. |
| • | Check the EGR Valve operation. |
|
