Question: how do you know if your car needs a fuel injector?
Answer: The Engine Misfires. Dirty fuel injectors may cause your vehicle's engine to misfire. ...  Idling Gets Rough. Does your vehicle sputter and shake when you're at a stop sign or sitting in traffic? ...  Your Gas Mileage Tanks. ...  The RPM Needle Starts to Dance. ...  Your Car Won't Start.