mechanics rags. I pulled his hoses to work on something on his car. I stuffed the rags in the holes to prevent something from being sucked into the engine. I finished the job and left him with the simple task of putting back on the hoses I removed. He called me saying "you did something to my car....what did you do?" I asked him to describe the issue, which was a very massive stumble. I ran through most of the typical issues and got nothing. I asked him if he pulled out all the rags and he was sure he did. I said fine and proceeded to run down the list again...checking and re-checking. I then asked him again "are you sure you pulled out all the rags". He replied yes. I told him to check the intercooler area. Turns out he left a rag in there. Tard. :)