Put bad gas in 2010 colbalt,it womt start now. What should i do?

Could be multiple issues.
#1 Is there gas in the tank? #2 is it bad gas ? (car sitting awhile) may need to put HEET in it and put in some good gas. You may have water in your fuel line. #3 is your fuel pump working? Your fuel pump relay may be bad. Hard to answer online.
Sounds like your battery is good and you are getting spark? I'd ask a local mechanic to take a look & trouble shoot.

Yes, I would highly suspect (frozen) water in the fuel. Dumping a couple of bottles of heet (should be able to get at a gas station or auto parts store) in the fuel tank. This MAY work, but likely you will have to get your car towed to a warm shop. Then have them change the fuel filter. Whenever it gets real cold you could put heet in the tank as a preventative. Heet is the brand make of a alchohol gas deicer. By the way, i'm from Alaska. Were enjoying the warmest winter in years right now.

It will not hurt the engine as long as it is clean water, muddy water will clog everything. You must drain the system and flush all water out ASAP.

Bad gas? If it had a little water in it, it should clear up shortly. Might try a bottle or two of HEET-isopropyl alcohol-to remove more water, if any.
If problem persists, I would have that knocking checked out.
Good luck.

it very possible could be some water in the gas that you got, put at least 1 bottle of heet into the gas tank, this will remove the water, that you might have got in the gas, you can purchase the heet at walmart, or any auto part stores, hope that this has helped you.

was the car running fine, before you put the new gas in the car, if the answer is yes, then , i would say , there is a chance that you could have got some water in your gas where ever you got it. " sometimes at gas stations, when the fuel runs low in their under ground tanks, they sweat and draw moisture, and then when a person pumps the gas , the water/ moisture goes into the customers gas tank, i would put 1-2 bottles of heet, into the gas tank to remove the water, that is if this is the case, after you do this, hope fully the engine will run fine, if it does not, then i would have someone to hook up a code tester, to the aldl link, to see what trouble codes have ben picked up by the computer, hopefully the problem will go away with the heet installed, hope that this information has helped you. you can buy the heet at walmart , or at a auto part store. p.s. try 1 bottle of heet first, and then if you need to add the 2nd bottle then you can, but see how it runs on only 1 bottle of heet first.

Probably a bad tank of gas. Go to your local parts store and buy a bottle or two of Heet. It's in a yellow bottle. Then drive to the nearest Chevron or Shell gas station and top off the tank after dumping the Heet in. If the problem persists then change out your fuel filter.

check to see if two plug wires are plugged into the wrong areas. That will make the engine miss with a soft popping noise if you have that sort of miss

May not be the fuel,but it would not be a bad idea to treat it as such.The NAPA auto parts sells two additives that are really good products,one is lucas fuel treatment for contaminated fuels.The other one is HEET,for water contamination.I would put a full bottle of LUCAS,and two bottles of heet.Put full bottles in for full tank or less.The additives work best with less fuel,so they will work in a consitrated level.If the additives are added soon,they will save the injectors.Bad fuel has been known to damage injectors so much as they have to be replaced.So if I can help,let me know.

Hello and yes this can be bad gas. This also can be something that can be fixed with a simple fuel or air filter change as well. I would do a basic tune up of spark plugs and wires which may fouled out it sounds like, oil and filter, air filter, and fuel filter. I would also change the distributor cap and rotary button. These few tune up items may help your rough running automobile. If you have any other questions email me and I hope you resolve this issue.