Cobalt SS/NA running rich
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Cobalt SS/NA running rich
Hey new member here,
I have a 2007 Cobalt SS/NA 2.4. It's been slowly losing power over the last month or so and the check engine light has been on and off. I'm getting P0300 Random- multiple misfire detected, and P0172 Bank 1 System too rich. I replaced both O2 sensors and it helped some, but today when I started it up the fan was running near full power and the car doesn't want to accelerate. When try the rpms go up and then fall like its straining to go. I'm thinking maybe the cats clogged? I do have a scanner with datastream. looking for help for how to proceed. Thank you!
I have a 2007 Cobalt SS/NA 2.4. It's been slowly losing power over the last month or so and the check engine light has been on and off. I'm getting P0300 Random- multiple misfire detected, and P0172 Bank 1 System too rich. I replaced both O2 sensors and it helped some, but today when I started it up the fan was running near full power and the car doesn't want to accelerate. When try the rpms go up and then fall like its straining to go. I'm thinking maybe the cats clogged? I do have a scanner with datastream. looking for help for how to proceed. Thank you!
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thanks for explaining. that makes sense
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Okay so I finally got around to cleaning the maf, unfortunately didn't seem to make a difference. I was concerned about exhaust leaks so I ran some seafoam through and sure enough there was more smoke coming from the headers than the tail pipe. I took the cover off the headers and theres a big crack running down the middle. looks like the gaskets bad too. Can an exhaust leak cause the car to run rich? I would think the opposite but I'm a newbie.
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Oh okay! And this morning when I backed out for work the rpms were erratic and then it stalled. once it warmed up it seemed to be better but I guess I'll have to replace the headers.
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01-30-2011 01:35 AM