Turn off the Engine: Ensure that the engine is completely turned off. Engage the Emergency Brake: Apply the emergency brake to prevent the vehicle from moving. Locate the Auto Stop-Start Button: Depending on your Ford model, the auto stop-start button may be located on the center console, dashboard, or near the shifter. If the amount of fuel required to operate during a cold start is not received by the engine your car will stall. 3. Bad Intake Air Temperature Sensor. A bad or malfunctioning intake air temperature sensor can create an issue with the air-fuel mixture of your car, causing it to stall or run rough. The computer relies on the IAT sensor to As soon as the contacts open, the starter circuit is turned off. Enhanced Starter Motor Operation (KL9) The Engine Stop/Start system in GM vehicles automatically turns off the engine when the vehicle. comes to a stop under certain driving conditions, and can quickly restart the engine in about 0.3 seconds. DON'T MISS: Start-stop systems to soar in number over next decade. Most such systems already keep the car's accessories—lights, wipers, audio system, climate control—operating as standard Stop start for any car takes a little to get used to. The biggest key is just patience. When you brake, just lift your foot completely, then press the gas, just don't rush. It can totally be annoying sometimes, but once you learn to just give it a split second it's fine. If you ever need it off, just hit the button. Auto stop/start must die; maybe the chip shortage will kill it. Jill Ciminillo March 22, 2022. I have long hated the mild-hybrid auto stop/start engine function automakers have been enthusiastically foisting on unsuspecting customers for the past several years. I mean, it saves like 0.04 gallons of gas for every tank. Here are the most common causes of the unavailability of the auto start-stop system in your Jeep: 1. Your Jeep's Main or Auxiliary Battery is Past Its Prime. The most common cause of stop-start unavailability in Jeeps is the failure of the auxiliary battery. Start-stop systems require more current than your conventional SLI battery can provide. Myth #1: Stop-start engines use more fuel. Research from the American Automobile Association found that stop-start technology resulted in a 5% to 7% improvement in fuel economy 2 . This saving may seem small but would certainly add up over the lifecycle of your car. In any case, the data shows that they certainly don’t use more fuel. UxcTJ.