Recently the idle has become very rough, it is difficult of start and it sometimes dies at traffic lights. I've changed the spark plugs, but the doesn't help. Replace this part sensor is bad. I will also describe it to you in case you can not download pic. Crank hash mark will line up with mark on engine block.
Belt goes on inside of idler and outside of tentioner.
The car has never given me much problems until now. I have taken the car to 2 places to look at and tell me why it wont start. The car is getting fuel and spark. Both shops said had low compression but should not keep it from starting. I also checked to make sure was getting air which it was.