Ok...so my car idles about 800 RPM, something is making my car shake really bad, and knock when it does it, after 1k RPM it comes out.

i took it to autozone, they told me i had a misfire on cylinders 2 and 4

I replace plugs, wires, and coil pack. Thats what they told me it needed....

Problem not fixed..Took it back, now they say its the EGR valve...

Replace it tonight...NOTHING!!

now im pissed done put over 300 dollars into it...Can anyone give me any suggestions...

 

possibly: pcm, cranks sensor, cam sensor, it is usually fairly tricky to diagnose these kind of problems since there could be so many contributors to the problem because everything works in sync.

 

Well i took it to shop today, there gonna run some compression test...they think its the timing belt...