Just replaced plugs, wires, coil pack as it was idle was very rough got to where it would almost die out. Now it hardly drives without major cut in power as if running on 3 cylinders idle jumps high and low, found a plastic pvc piece that's broken runs from top of block head into large black hose, what's the name of that piece can't find it at Auto Zone?

Have you cleaned the throttle body and throttle body valve? have you cleaned the idle speed control air bypass valve? are the injectors clean? Are there any fault codes in memory, do the things I mentioned if you haven't already. Also hard engine mounts can cause roughness at idle. Another thing is the timing belt tight?

Very much doubt it's related, but sounds like another coil pack has died, shuddering is likely brakes!!

It could be a bad spark plug , spark plug wire or if your car has a coil pack then the number one coil could be going bad.

What about new spark plugs and wires?

If you run the OBD II codes,it'll give you an idea. I would suspect the usual offenders......old spark plugs,wiring,or coil pack problem.
An EGR can cause jerking and dying, but so can a vacuum leak,usually accompanied by rough idle before the engine dies.
I just did my sister-in-law's plugs,wiring, and coil pack in THAT order,because the code only showed `MISFIRE,cyl. #2.'
Even though the plugs and wiring were pretty worn,it turned out the coil pack had gone bad.
Also,how long since you replaced your fuel filter? don-ohio (:^)

Your ignition spark control module is going bad,your coils pack are located right underneth them. this is what tells your coils packs to produce spark to your spark plugs. they are easy to replace just make sure you mark you coil pack with some tape and make sure you put them back in the same order as they came off the spark control module. Easy to replace,just make sure you use the proper size torx or socket size on the screw heads...

The problems you are describing indicate to me that you likely need to replace the coil pack that runs from the spark plugs ,and the plug wires end up at it.It also may be the spark plug wires,get a water bottle and spray the wires after dark and if you get a light show from them then replace them,if not,replace the coil pack.

check and or change the plug wires also check for a crack coil pack which is highly likely on that model and also check the ignition module as well

to reset the computer simply unplug the battery for about 30 minutes.

However, you have a different problem I believe. you need to check your plugs and wires/coil packs. A fouled spark plug will cause rough running at any speed.

Hi check all the fuse. fi the fuse are ok . remove the coil pack and reverce if the cly missifire change replace the coil if not chage replace the electronic comtrol module ok.