A bad alternator can cause your battery to drain to the point it can’t turn your Fiesta over. Suspect the alternator if the battery light stays on after charging your car’s battery or jumping it. 3. Starter Motor. The next thing to look at when your Fiesta isn’t starting would be the starter itself. Check the pinion gear. It is a small gear found at the front of the starter of your car that will engage the flywheel and crank your engine. You should ensure that the teeth of your pinion gears are not worn-out or damaged. Damaged teeth will prevent your car engine from cranking. Try moving your pinion gears. 2. Dip the clutch when turning on the ignition. Another sneaky trick that can sometimes work is dipping the clutch slightly as you turn the ignition. This actually reduces the amount of work the battery has to do, and gives the engine a fighting chance of starting up, even in a cold car. 3. RELATED: 5 Reasons Your Car Is Hard To Start When Cold & How To Fix. 3. Clogged Fuel Filter or Fuel Pump (Low Fuel Pressure) To supply the fuel to the engine, the pump has to be working right. As the weather gets colder, a failing fuel pump can start to give out. 7 I have a diesel powered Audi A4 B7 (2006) 2.0TDi (the 170BHP variety) with a manual gearbox, which I've owned for around 18 months. The car has just short of 100k miles and has a full dealer service history. The car was given a service just under 12 months ago, and it was a major service. 3. Start your timer, wait 11 minutes. The light should go off. If it doesn't this isn't going to work so don't bother. You can jump to step 4 when the light turns off. 4. put the key to off, do not remove it. 5. Go back to step 2, do this twice, for a toal of 3 times or a total period of 33 minutes. 6. Another telltale is turning the AM radio to a low number on the dial without music, then revving the engine. If you hear a whine or the sound goes fuzzy when you hit the gas, your alternator is probably failing. If the vehicle won’t crank or start but the headlights are still working, look to problems with the starter or other parts of the Thanks! Sometimes my Kia wont start. Other times it will. When it will not everything inside the car turns on but the engine itself wont start. I took it to my mechanic and he could not find any issue or recreate the issue. It just happened again this morning and when I went out to check it an hour ago it now started this time. dmlj.