For the last few days my car has been running kind of erratic. Nothing major. I had the injectors replaced except one. The guy forgot to put one of them in. I figured that after running for a couple of weeks the one injector may not be working like the rest. Today I had one come loose while I was checking the connections and it started leaking. When I removed the injector the o-ring fell in. Will that mess up anything? I'm worried I have damaged the engine now. I'm worried because now it's idling worse than before. Gas mileage is a little off but not bad. I'm going to change the odd injector tomorrow. Is there anyway to suck that o-ring out of there?