Emission Control Systems: Testing and Inspection

Engine will not start or is hard to start
Vacuum hose disconnected or damaged.
Repair or replace.
The EGR valve is not closed.
Repair or replace.
Malfunction of the evaporative emission purge solenoid.
Repair or replace.

Rough idle or engine stalls
The EGR valve is not closed.
Repair or replace.
Vacuum hose disconnected or damaged.
Repair or replace.
Malfunction of the PCV valve.
Replace.
Malfunction of the purge control system.
- Check the system, if there is a problem, check its component parts.

Engine hesitates or has poor acceleration
Malfunction of the EGR system.
- Check the system, if there is a problem, check its component parts.

Excessive oil consumption
PCV line clogged.
Check PCV system.

Poor fuel mileage
Malfunction of the EGR system.
- Check the system, if there is a problem, check its component parts.