i have this rhythmic idiling from my car and don't know what i should check first... i haven't gotten a bentley's yet neither... but soon.
everything works great, except for when i'm idiling... it goes up and down, up and down... the tach doesn't jump though... just the engine idling up and down.
could it be a vacuum leak?? icv?? cap?? rotor??
any suggestions would be greatly appreciated...