ocasionaly when im driving my service engine soon light comes on. I have no idea why. It only happens every once in a while and if i turn the car off, and start it again, its gone. if u take a screwdriver or somthing metal and put it on either of the fuel rails, and put your ear up to it, you can hear a ticking, kinda fast paced, i dont know if this is normal or if somthing is going wrong, i dont know if that could be it or the fact that my cats are rustin out...any info/help would be apreciated
thanks

 

Do a search on how to find what code is popping up with your check engine light also whens the last time your oxygen sensor was replaced. Find your code first . The code will give you the area that the problem is in

Dynodan

 

will that code reading thing work if the light isnt on constantly?

 

yes, the codes are stored for a long time, unless the battery is disconnected.