DRIVEABILITY AND EMISSIONS 6E1-91
Rough, Unstable, or Incorrect Idle, Stalling Symptom (For Open Loop System)
Step Action Value(s) Yes No
9
Check for a lose ignition coil ground.
Refer to Electrical Ignition System.
Was a problem found?
-
Verify repair Go to Step 10
10
Check the items that can cause the engine to run lean.
Refer to Idle CO Concentration Check and Adjustment.
Was a problem found?
-
Verify repair Go to Step 11
11
Check the injector connections, if any of the injectors are
connected an incorrect cylinder, correct as necessary.
Was a problem found?
-
Verify repair Go to Step 12
12
Perform the injector Coil/Balance Test.
Was a problem found?
-
Verify repair Go to Step 13
13
Check the following engine mechanical problems:
Low compression
Leaking cylinder head gasket
Worn or incorrect camshaft
Sticking or leaking valves
Broken valve springs
Camshaft drive belt slipped or stripped
Was a problem found?
-
Verify repair Go to Step 14
14
1. Check for faulty motor mounts. Refer to Engine
Mechanical for inspection of mounts.
2. If a problem is found, repair as necessary.
Was a problem found?
-
Verify repair Go to Step 15
15
1. Review all the diagnostic procedures within this table.
2. If all procedures have been completed and no
malfunctions have been found, review/inspect the
following:
Visual/ Physical inspection
Scan tool data
All electrical connections within a suspected circuit and/or
system
Was a problem found?
-
Verify repair
Contact
Technical
Assistance
To Next Page
