Workshop Manual

6E–522
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Excessive Exhaust Emissions or Odors Symptom
Step Action Value(s) Yes No
1 DEFINITION:
Vehicle fails an emission test. Vehicle has excessive
“rotten egg” smell. (Excessive odors do not necessarily
indicate excessive emissions.)
Was the “On-Board Diagnostic (OBD) System Check”
performed? — Go to Step 2
Go to OBD
System
Check
2 1. Perform a bulletin search.
2. If a bulletin that addresses the symptom is found,
correct the condition as instructed in the bulletin.
Was a bulletin found that addresses the symptom?
— Go to Step 13 Go to Step 3
3 Was a thorough visual/physical check performed?
— Go to Step 4
Go to Visual/
Physical
Check
4 1. Check for vacuum leaks. Check vacuum lines,
intake manifold, throttle body, etc.
2. If a problem is found, repair as necessary.
Were any vacuum leaks located?
— Go to Step 13 Go to Step 5
5 1. Check the fuel cap for proper installation.
2. Secure the fuel cap if necessary.
Was the fuel cap installed properly?
— Go to Step 6 Go to Step 13
6 1. Check the fuel pressure. Perform the procedure in
Fuel System Pressure Test .
2. If a problem is found, repair as necessary.
Was a problem found?
— Go to Step 13 Go to Step 7
7 1. Check for a faulty, plugged, or incorrectly installed
crankcase ventilation valve; also check the
crankcase ventilation system for plugging.
2. If a problem is found, repair as necessary.
Was a problem found?
— Go to Step 13 Go to Step 8
8 1. Check the injector connections.
2. If any of the injectors are connected to an incorrect
cylinder, correct as necessary.
Was a problem found?
— Go to Step 13 Go to Step 9
9 1. Perform the “Injector Coil/Balance Test” in Fuel
Metering System .
2. If a problem is found, repair as necessary.
Was a problem found?
— Go to Step 13 Go to Step 10
10 1. Refer to Engine Cooling for cooling system
diagnosis.
2. If a problem is found, repair as necessary.
Was a problem found?
— Go to Step 13 Go to Step 11
11 1. Check EVAP canister for fuel loading. Refer to
Evaporative Emission Control System .
2. If a problem is found, repair as necessary.
Was a problem found?
— Go to Step 13 Go to Step 12