cara will not start

Was it starting before you worked on it? If it cranks good but won't start, go with the basics. Have a helper crank it, while you visually check for spark at the plugs. If you have spark everywhere, use a gage and check fuel pressure. Check for applicable trouble codes. At the least you need an obd2 code reader. Any tester you might get, read on it, make sure it will work with your year--make--model.

Yes it was starting before these wer changed, it would run then sputter out. Hooked it up and the codes were for the sensor. Will try your suggestions. Thanks!

What were the actual code number/s. There are a bunch of 02 sensor codes. Just for testing, you might unplug 02 sensors, see if vehicle will start and run. There two 02 sensors.

P0036 and P0141, car turn over but will not crank to start. since it won't start the auto part store said that the computer will not read a problem now. Going to replace spark plugs.

Changed the plugs now it will start but it refuses to idle on its own, will run as long as i keep giving it gas. No more problem codes are coming up...now what do you think the problem can be?

Clean the throttle-body and check idle air system.