Dieseling, Run-On Symptom
Step
| Action
| Value(s)
| Yes
| No
|
DEFINITION The engine continues to run after the key is
turned off, but runs very rough. If the engine runs smooth, check the
ignition switch and the adjustment.
|
1
| Did you perform the On-Board Diagnostic
(OBD) System Check?
| --
|
Go to Step 2
| Go to the
Powertrain On Board Diagnostic (OBD) System Check
|
2
|
- Perform a bulletin search.
- If a bulletin that addresses the symptom is present, correct the
condition as instructed in the bulletin.
Did you find a bulletin that addresses the symptom?
| --
|
Go to Step 6
|
Go to Step
3
|
3
| Did you perform a visual/physical check?
| --
|
Go to Step 4
| Go to
Symptoms
for the Visual /Physical Check
|
4
|
- Check for a short between B+ and any of the ignition feed circuits.
Refer to Fuse and Relay Block Diagnosis or
Wiring Repairs
in Wiring Systems.
- If a problem is present, repair as necessary.
Did you find a problem?
| --
|
Go to Step
7
|
Go to Step 5
|
5
|
- Check for the following conditions:
• | Fuel in the fuel pressure regulator vacuum hose. If fuel is present
in the hose, replace the fuel pressure regulator assembly. Refer to Fuel Pressure
Regulator Replacement. |
- If a problem is present, repair as necessary.
Did you find a problem?
| --
|
Go to Step
7
|
Go to Step
6
|
6
|
- Review all of the diagnostic procedures within this table.
- If all of the procedures have been completed and no malfunctions
have been found, review/inspect the following:
• | All of the electrical connections within a suspected circuit and/or
system. |
- If a problem is present, repair as necessary.
Did you find a problem?
| --
|
Go to Step
7
|
Go to Step
3
|
7
| Operate the vehicle under the
same conditions (as closely as possible) as when the original symptom occurred.
Is the original symptom still present?
| --
|
Go to Step 3
|
Go to Step
8
|
8
| Are other driveability symptoms still present?
| --
| Go to
Symptoms
| System OK
|