I have put new injectors coil packs and spark plugs 7 months ago. Now i had codes mis fire 5 6 and 7. I change spark plugs and coil packs. After sitting for 20 min or so its hard to start. Once start you see smoke and a rich smell. P0172 p1132 p1152 is the codes. So i replace both 02sensor. It does same thing. No air leaks tried that. When going in reverse it will cut off on me of i dont five alot of gas. Once a go runs good. But between 45mph and 50mph runs little rough. Please help out of solutions.

 

google those codes and read the possibilities.

dirty maf
vacuum leak and other stuff

Do you use a K&N filter?

 

No its the original

 

You are not understanding the system operation and not looking at the code descriptions.
What does 172 tell you? Rich bank 2. All the cylinders misfiring are on bank 2.
Do you see the correlation?
.
Codes 1132 and 1152 are telling you both Ox sensors are seeing the rich condition and are not functioning.
They are not the trouble but in the path of the excess richness. Leave them alone.
.
Likely the injectors could be leaking, the fuel regulator is leaking fuel into the intake through the vacuum line or the fuel pressure is way to high from a faulty fuel regulator.
Look at the vacuum line for presence of gas and test fuel pressure.
Would you accept this as the reason you see smoke, hard starting and lack of Ox sensor fuel control (1132/1152) as due from the excess richness?
This is the trouble shooting you need to be doing rather than just replacing parts by guessing.
Good luck.

 

You might be right let me check that

 

Clogged cats was the problem

 

Do a final look see with a Scanner to be sure all the parameters are normal.
Misfires and excess richness all ends up in the Cats and could destroy them again.
The excess raw gas will burn in the cats and do them in.
They already operate at more than 600 degrees in normal operation.
Excess gas will take them to more than 1000 degrees and melt the internal structures.
This is why you need to re check.

Good luck.