I just replaced the ignition coils and spark plug wires on my car and now whenever I start the car it cranks longer than usual and I feel a loss of power while driving it. Any ideas what the issue could be?

 

A common mistake is to get the firing order wrong. Double and triple check it. Sometimes coils and wires are defective, so if the former does not fix it, methodically test each new coil and wire.

 

Yeah, you prolly got the wires mixed up or the plugs in the wrong place.
The leading plugs are on the bottom, trailing on the top.

Ensure you've got the plugs in the right holes.

Now check that your wiring is correct.

Starting at the coil pack toward the front of the car working back towards the firewall the order is:
leading front rotor - trailing front rotor - leading rear rotor - trailing rear rotor.

Once you've got this straightened out your car will prolly start and run just fine.

In the future, change things one at a time. Coil, Wire, Plug, so as to not get things mixed up.

 

+1^
Another thing that happens is that the wires are not fully connected.
You should feel/hear a 'snap' when they are connected properly.

 

Yeah I guess when I was putting every thing back one of the wires got unplugged.

 

Also, you may have to press the spark plug wire onto the plugs lightly until it clicks. Rushing it could bend or snap the leads inside; while it looks seated because the boot is in place, the leads may not be in proper contact with the spark plugs. You can check this by pulling back on the wire for a loose or a snug fit.