2003 Mercury Grand Marquis Q&A

2003 Mercury Grand Marquis Question: My car is riding rough after I changed plugs and coils oh no check engine light

I had the intake manifold replaced it was cracked 2 months later check engine light came on car misfiring started with cl 8 so went through and changed all coils and plugs. found water in cl 5 blew it out changed that too now its a little better but still rough on acceleration oh cleaned MAS what am I missing? -
Answer 1
read live data while driving to determine issues -