I put a timing belt on my 2004 kia spectra and change the crank and cam senors. i check all my codes and they were clears. why does my engine vibrate. it start up good.

run the fault codes first
could be crank/cam position sensor or immobilizer

check that the cam shaft is turning ( broken timing belt) .run fault codes and check for cam/crank position sensor. check operation of immobiliser

It is necessary to remove the timing belt to change the pump. Take the opportunity to put on a new belt while you're at it. Cam alignment is fairly easy. Look at
How to Replace the Timing Belt on 2005 KIA Spectra eHow

Have the same problem in our 2002 Spectra. The bad news we received was that in 2002 Kia put some not so good engine blocks in that allowed the crank keeper key to "hog-out" it's slot. This allows the crank to shift a little in timing, which makes cam sensor error and make check engine light come on. Even with a new sensor, it will happen. Our mechanic's best advise was to drive it, local only, until it finally gives way, then find used engine, either newer or older. The only year it would appear to affect is 2002. If your mechanic tears the engine down as though changing timing belt, he or she should be able to see if this is the case.

Its possible the gears are not on the right marks.
Have you checked cam timing since replacing the second belt ?

Aligning the dual-cam pulleys - YouTube

? 3:22
https://www.youtube.com/watch?v=DPcoLEHEt1I
Nov 30, 2010 - Uploaded by JT
me trying to figure out how to realign the dual-cam pulleys that shifted when I removed the timing belt, shifted ...

2002 KIA Rio 1.5 Liter Timing Belt Replacement - YouTube

? 14:47
https://www.youtube.com/watch?v=jLkdnkFW9c0
Aug 10, 2012 - Uploaded by TheBGravit
Replacing the timing belt on my 2002 KIA Rio. ... Hubitools Universal Timing Gear Clamp - Duration: 1:26. Hubi Tools 618,464 views. 1:26. How to Align the Camshaft if My Timing Belt Broke : Timing Belts & Other Auto ... Kia Spectra Timing Belt Replacement - 1.8L DOHC Engine Part 1 - Duration: 11:36.

How to Align the Camshaft if My Timing Belt Broke : Timing ...

? 4:10
https://www.youtube.com/watch?v=yKFAmfeaycs
May 21, 2013 - Uploaded by ehowauto
Subscribe Now: http://www.youtube.com/subscription_center?add_user=ehowauto Watch More: http://www ...

Well, it is either a timing belt/chain going out or a bad crank position sensor most likely causing the other problems. The O2 sensor may be bad as well but that usually doesn't cause the Misfire. The vehicle on board computer is confused, that is why it is throwing all those codes. and why it gives you that 1166 code which isn't defined. Check the crank position sensor and the timing and timing belt first. Once you have that fixed the rest should clear up.

Hello and thank you for asking your question here on fixya.com.

I have actually written a general information article that will walk you through the general process of changing the fan belt on your 2004 Kia Spectra. It will also point you to the resources you need for getting the diagrams of how the belt needs to go back on. Belts usually cost less than $20 and take a few minutes to put them on.

Here is a link to that article:
How to change the fan belt on your 2004 Kia Spectra

If this has helped you in any way, then feel free to follow my Twitter account for more great money saving tips and tricks. twitter.com/acoates23234
I follow back, too. :)

Thanks for reading.

if you have dual over head cams and if your timing belts breaks u can cause valve or piston damage if its single over head cam there wont be any damage to any valves or pistons on those type of kia engines

Did you get the timing marks lined up when you put it on?