My 2010 Chevy equinox had a check engine light on because the catalytic converter I was gonna get it fixed when I get my taxes but I noticed it was getting louder so I went to O’Riley to check my engine light again and it was spitting out a number 4 Misfire so I got the coils and spark plugs replaced but now it’s even worse it doesn’t stay on. It’s wants to start up but can’t I Don’t know what it could be.
Double check your work Make sure the parts are the right ones and everything is in proper position. It ran before but not after you most likely messed up somewhere along the line. As for the cat on the top of page search. Omg Cataclean works. Maybe this will work for you.
Next to the bell search it there
Is the cat clogged? Usually from the little I have seen cat errors followed by a misfire error means you are having a problem somewhere else. I had the same thing on an old jeep and it ended up being a warped head that was fixed under warranty. Does it have the 3.6 engine?
Do a compression check and check for a blown head gasket.