My wife has a 2013 Chevy avalanche with a 5.3. I did new upper lower radiator. Hoses changed out. The fluid changed out the belt alternator idler pulley change the spark plugs and wires and one of the coils. One of the coils when we were removing the plugs were broken. Now the car will not idle really rough idle. I replace the mass air flow sensor after replacing the mass air flow sensor wouldn't even run. It just would run for about 5 seconds and die. Put a new mass air flow sensor in again. It ran a little better replace the throttle body. Reset the throttle body new intake manifold gasket injector o-rings another mass air flow sensor again O2 sensor on both sides and I'm still getting a lean air fuel mixture on bank one and two and it will not idle it. Runs once you get it running it run great but it just will not when you first start it up it just runs like crap. I was fiddling around with some of the wires and I noticed that when I mess with the coolant temperature sensor it would make a difference. So I replace the coolant temperature sensor and it's running better but it's still not running good. Any suggestions?