1997 BUICK CENTURY
3.1 V.6 SFI
Check engine light codes for CAM SENSOR and EGR
work done to repair = changed spark plugs and wires changed fuel filter
tech = JK
question = car stalled wait a sec ran was good for month but lately
everyday or so stalled out until one day stopped running. Starts for a
second then stalls. Coil pack and ignition module tested good. You can
hear the fuel pump come on there's gas at the shrader valve where you
put PSI gauge on the tree. Changed the gas filter. Took it got it
scanned EGR code and (CMP) Sensor code came up.
3.1 V.6 SFI
Check engine light codes for CAM SENSOR and EGR
work done to repair = changed spark plugs and wires changed fuel filter
tech = JK
question = car stalled wait a sec ran was good for month but lately
everyday or so stalled out until one day stopped running. Starts for a
second then stalls. Coil pack and ignition module tested good. You can
hear the fuel pump come on there's gas at the shrader valve where you
put PSI gauge on the tree. Changed the gas filter. Took it got it
scanned EGR code and (CMP) Sensor code came up.
WARNING LIGHTS
The exhaust gas recirculation (EGR) system is used to lower oxides of nitrogen (NOx) emission
levels caused by high combustion temperature. It does this by decreasing combustion temperature.
The main element of the system is the EGR valve. The EGR valve feeds small amounts of exhaust
gas back into the combustion chamber. With the fuel/air mixture thus diluted, combustion
temperatures are reduced.
If a problem with the EGR system will not allow the PCM to control pintle position properly, DTC
P0404 should set. The PCM also tests for EGR flow. If incorrect flow is detected, DTC P0401 should
set. See DTC list for other EGR codes.
levels caused by high combustion temperature. It does this by decreasing combustion temperature.
The main element of the system is the EGR valve. The EGR valve feeds small amounts of exhaust
gas back into the combustion chamber. With the fuel/air mixture thus diluted, combustion
temperatures are reduced.
If a problem with the EGR system will not allow the PCM to control pintle position properly, DTC
P0404 should set. The PCM also tests for EGR flow. If incorrect flow is detected, DTC P0401 should
set. See DTC list for other EGR codes.
A cam sensor code can cause a hard start or no start. The wires right at the
sensor get swollen / broken. The sensor is under the power steering pump.
Starting and stalling after a few seconds almost sounds like a theft / security
problem, but need to get cam code fixed first.
There are several different things that can cause an EGR code, depending on
what the exact code is.
Be sure to check ALL fuses as well.
