Another P0300 Code
I am having a problem with my 06 cobalt LS with 115K miles on it. About two weeks ago car was running very badly, no pick up and took forever to get up to speed. CEL was blinking at first then went solid after 15 minutes. Took car and had code read, P0300 random misfire. Removed gas cap and tightened back on, no fix. Used the car that night and it ran fine for about 30 minutes and then started acting up again, the CEL is on the entire time.
Replaced spark plugs (no gap required plugs) , the next day I get gas and make one stop, turn car off and on and the CEL goes away and car runs fine for about 8 days.
Now the CEL is back on, car has absolutely no power, almost stalls at idle. I put seafoam in the gas tank, no luck.
Also, there is a smell of like burning rubber(and not the tires) and the exhaust sounds rough.
Not looking to throw a lot of money on the car. Bought the car with 75Km and besides changing the oil, oil and air filter haven't done anything else, besides the plugs mention above.
Thanks for the help.