Good afternoon,
My cobalt is making some serious knocking sounds. When I turn the key the engine turns over and then bogs for a second before barely catching itself attempting to idle. When I press on the gas a knocking sound speeds up with the speed of the engine. I checked the pressure in each valve and got these results: (97 / 131 / 135 / 132)psi respectively.
A little more detail if it helps, while driving the day before yesterday I noticed that when I tried to speed up quickly it felt as though my clutch was slipping, or as though I was losing a little power from time to time. It gradually got worse, and yesterday on my way home from work I was losing power more and more quickly. It got so bad that I could barely keep my car above 65 on the highway.
Here are the codes that my car is putting out:
P0128 - Coolant temp below thermostat regulating temp
P0455 - EVAP Emission Control System Leak (Large)
P0442 - EVAP Emission Control System Leak (Small)
P0326 - Knock sensor 1 CKT Range Perf/Bank 1 or 1 senor
P0442 - EVAP Emission Control System Leak (Small)
Any and all time taken to review my issue, and/or respond is greatly appreciated. If you have any questions or concerns please feel free to let me know at any time, and I will respond the moment I get your message. Please, thank you, and have a great day y'all.
Respectfully,
Phillip B.
U.S. Marine Corps
My cobalt is making some serious knocking sounds. When I turn the key the engine turns over and then bogs for a second before barely catching itself attempting to idle. When I press on the gas a knocking sound speeds up with the speed of the engine. I checked the pressure in each valve and got these results: (97 / 131 / 135 / 132)psi respectively.
A little more detail if it helps, while driving the day before yesterday I noticed that when I tried to speed up quickly it felt as though my clutch was slipping, or as though I was losing a little power from time to time. It gradually got worse, and yesterday on my way home from work I was losing power more and more quickly. It got so bad that I could barely keep my car above 65 on the highway.
Here are the codes that my car is putting out:
P0128 - Coolant temp below thermostat regulating temp
P0455 - EVAP Emission Control System Leak (Large)
P0442 - EVAP Emission Control System Leak (Small)
P0326 - Knock sensor 1 CKT Range Perf/Bank 1 or 1 senor
P0442 - EVAP Emission Control System Leak (Small)
Any and all time taken to review my issue, and/or respond is greatly appreciated. If you have any questions or concerns please feel free to let me know at any time, and I will respond the moment I get your message. Please, thank you, and have a great day y'all.
Respectfully,
Phillip B.
U.S. Marine Corps
Aug 4, 2015 at 12:37 PM