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Have a block heater installation the day light things warm up at night it gets really dry cold that's when the block heater keeps the engine warm enough to start.
Cold weather makes the engine hard to start for two main reasons. First, oil thickens when it's cold, which increases friction and makes it harder for the starter motor to spin the engine. Cold also slows the chemical reaction in the car's battery, reducing its power output. Battery output is usually rated at 77°F, below which starting power drops drastically. You can ensure that your car will start in the worst weather by keeping the engine or the battery, or both, warm. You may want to consider a trickle charger for the battery to keep the chemical reaction working and an engine block heater to make it easier for the pistons to move freely.
If plugs, wires, and battery is new and good, make sure you are using 5w30 oil which is thinner and is made for winter. If needed, replace the fuel filter. There is a cold start valve that may be giving you problems. You can go to autozone.com and register for full free online repair manual for your car.
Your Jetta has a block heater available. It plugs in and keeps the block warm, making it easier to start. Below is a link with step by step instructions for battery replacement.
Most vehicles have problems starting when it is cold. Short of installing a block heater, your problem lies in your battery. if it is cold in your area for a few months of the year, my suggestion is to invest in a higher rated CCA battery, and a block heater.
Cold Cranking Amps is a rating used in the battery industry to define a battery's ability to start an engine in cold temperatures. The rating is the number of amps a new, fully charged battery can deliver at 0° Farenheit for 30 seconds, while maintaining a voltage of at least 7.2 volts, for a 12 volt battery. The higher the CCA rating, the greater the starting power of the battery.
For a temporary fix, remove the battery and take inside for a few hours, or get a jump from an already running vehicle.
This morning it was -19F here, and my new car gave me a fit starting, so you are not alone. Replace the battery, and pay a little higher premium for CCAs and you should be fine. Good Luck.
Most vehicles have problems starting when it is cold. Short of installing a block heater, your problem lies in your battery. if it is cold in your area for a few months of the year, my suggestion is to invest in a higher rated CCA battery, and a block heater.
Cold Cranking Amps is a rating used in the battery industry to define a battery's ability to start an engine in cold temperatures. The rating is the number of amps a new, fully charged battery can deliver at 0° Farenheit for 30 seconds, while maintaining a voltage of at least 7.2 volts, for a 12 volt battery. The higher the CCA rating, the greater the starting power of the battery.
This morning it was -19F here, and my new car gave me a fit starting, so you are not alone. Replace the battery, and pay a little higher premium for CCAs and you should be fine.
Good Luck.
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