Ok here is the problem
When the car is warm (running for over an hour) The car misfires at idle and also when I get on the throttle (car almost won't accelerate at all) it only happens when the cars been running for a while, and when the weather is really warm.

So far I have changed my spark plugs, and cleaned my throttle body and IAC valve.
I took it to the local dealership but they couldn't get it to misfire so they sent me home.

Please Help,

 

Remove both of your Crank sensors (REF & POS) and clean them up. They tend to collect fine metalic dust which interfears with their signal.

 

Do you really think it could be the crank sensor. The reason I ask is th it only happens when the car has been running for a long time in the heat.

 

That was the way mine was at first. After a couple hours of driving, I started the car and the thing was audibly and palpably misfiring. Restarting the car wouldn't change anything. Next morning, it was running fine again. Then the misfiring became random. Stangely enough, if it was going to misfire, it was right from the starting of the car. In other words, I wouldn't be driving it and it then started misfiring.

Long story short, in the misfire state with continued driving, it threw a cylinder code. Ended up replacing all the coils ($200 brand new for 6) and problem was gone.

 

some ideas...just ideas...

0- Engine Coolant Temp Sensor
0- MAFS
0- check your rad and coolant levels!

FLO_BOY

 

It appears that I fixed it. I checked the coils and one was bad and two others were weak so I replaced all six coils.
I am kinda ****ed since my car only has 42000 miles.