Hello all,

So just yesterday I was sitting at a light and i felt this little bump after I came to a stop. I first thought it was my transmission downshifting late but after I came to a stop again it repeated over and over.

It's a weird sound/feeling. The car can be in park and idling at a rock solid 650rpm. Every few seconds it will just bump. I can feel it too. I listened to the engine and it sounds just as good as the day i bought it but when i listen to the exhaust i hear it.
I have no CEL, the A/C is off and no noticeable performance issues.

Please watch the video. It occurs @ seconds 11, 13, 16 & 33.

http://youtu.be/Q6GNOgC7cEs?list=UUNS_z ... B9k0zO5ATA

Any ideas? :wtf2:

 

Sounds like a failing ignition coil to me.

 

Wouldnt that generate a CEL?

 

Hook up your vehicle to OBD scan tool with live feed to check for error code, impending error code and readiness. Failing ignition coil sometimes will not trigger the CEL but it will give an error code on the scanner.