Inspection
| Action
|
DEFINITION: A constant jerking that follows the engine speed, usually more pronounced
as the engine load increases which is not normally felt above 1500 RPM or 48 km/h
(30 mph). The exhaust has a steady spitting sound at idle, low speed, or hard
acceleration for the fuel starvation that can cause the engine to cut-out.
|
Preliminary Inspection
|
| • | Compare the scan tool data at idle with the scan tool data list. Refer
to
Scan Tool Data List
. |
|
Sensor Inspection
|
| • | Observe the fuel rail pressure (FRP) sensor and the fuel pressure regulator
commanded percent at idle. FRP should be near 40 MPa, and commanded percent
should be near 40 percent. If the command is high, a fuel pressure or sensor
exists. |
| • | Inspect the crankshaft position (CKP) sensor reluctor wheel. Remove the
CKP sensor and attempt to move the reluctor wheel front to back or side to side with
a probe. If there is any movement the reluctor wheel retaining bolts are loose. |
|
Engine Mechanical Inspection
|
| • | Inspect the engine for the following conditions: |
| • | Inspect the intake and exhaust manifold passages for casting flash. |
|
Fuel System Inspection
|
| • | Inspect the fuel system for a plugged fuel filter, high vacuum, air in
the fuel system, etc. Refer to
Fuel System Diagnosis
. |
|
