After changing the spark plugs, the car started up!

It now has a crappy idle. I changed the ccv, but i think one of the tubes is not on all the way and is creating a vacuum leak. I plan on deleting the ccv.

I changed the disa valve at the same time as the ccv.

When I drive the car and make a slow turn, the car dies. I have the maf unplugged, which helps, but the idle is still bad.

So my question is, can a faulty fuel pump relay or the fuel pump be a problem too?