Skip the auto shop - Our mechanics make house calls

Q: My truck will not start in cold weather and its only 32degrees out

asked by on

Cranks over very strong but will not start. Once it gets warm outside usually takes 2 days starts just fine.

My car has 140000 miles.
My car has an automatic transmission.

Hi There, You may have a problem with a faulty cold start injector. When you start your car in the morning and turn the key to on, the coolant temperature sensor immediately reads the temperature of the coolant and relays this to the computer indicating that the coolant is cold. The computer then knows at this point that it needs to enrich (add more fuel) the air/fuel mixture at startup due to the change in air density. When you start the car, you will notice that it idles high for a period of time until the engine warms up. This is done with what is called a cold start injector which injects more fuel into the motor until the engine reaches a specific operating temperature. The computer simply feeds a little extra gas through the fuel injectors to start the engine and then maintains a certain amount of fuel supply to the motor until it is warm. I would recommend having an expert from YourMechanic come to your location to take a look at your vehicle and diagnose your cold start issue.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Power steering hose leaking might be leaking

Hello. If there is not a serious leak, some mechanics will not mention it either because they missed it or because they felt like it was not significant enough to do so. If you really want to know, you need...

Q: clicking noise in steering

Hello, and thank you for writing in. The first components to consider when you experience these symptoms are the tires. They will create noise and vibration when they are inflated improperly, out of round, or out of balance. If the...

Q: Truck makes loud noise when accelerating

Hello. There are multiple things that may cause loud noises when stepping on the gas pedal such as axles,valve lifters, and catalytic convertors. I suggest having a technician inspect the vehicle as again there are several things that may cause...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...