Q: The car is hard to start after sitting for an hour

asked by on June 08, 2016

Hello. I have starting issues with my car that happen only when the car is not in motion for one or two hours. It takes the car up to 15 tries of engaging the ignition to start up. After that, the engine seems sluggish and makes a sputtering noise. There is also low idling at around 350 RPM on average. Once it didn't start at all after trying for more than ten times. The issue however, only occurs when the car sat for one or two hours and it doesn't depend on the outside temperature. Why is this happening? How can I fix this? I appreciate your help.

Hello. There are several different things that could be causing your starting issue. There could be a bad spot in your starter which would make the vehicle hard to start. You could have an intermittent fuel pump problem which would decrease the amount of fuel that gets to the engine during startup. It is also possible that that your coolant temperature sensor is faulty. If the coolant temperature sensor is not reading the engine temperature correctly, the engine control module will not be able to adjust the fuel/air mixture properly. Have a certified technician, like one from YourMechanic, inspect of all of these systems and components in order to pinpoint your problem.

Was this answer helpful?
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

Jerking reaction when accelerating

What you are describing sounds like a dirty or faulty mass air flow sensor. The mass air flow sensor monitors air intake as it is mixed with fuel prior to being injected into the motor. This sensor relays vital information...

Loud rattling coming from bottom of car

Hi. This should be inspected soon as damage to the underside of the car can be costly. There are metal and rubber mounts that hold up the exhaust system which over time can become loose. This could also cause damage...

Why would my Nissan Maxima make loud humming noise when I accelerate up 55mph but noise stops or gets softer at 60mph.

It sounds like you may also need to change the right front bearing as well. Bearing damage usually happens slowly over the course of days or weeks or maybe even months. You may notice the noise getting louder and louder...

Related articles

How Does a Starter Motor Work?
When you turn the key in your car’s ignition, the engine turns over and then cranks. However, getting it to crank...
A Buyer’s Guide to the 2012 BMW 6-Series
With With an eye-catching restyled exterior that still boasts the basic signature grille shape, the 2012 6-Series is packed with modern features while maintaining its classic image and top-of-the-line performance. Key Features 4-way adjustable suspension BMW apps –...
How the Starter Works in Your Car
A A car starter is a powerful electric motor that cranks your engine in order to start your car. The starting system consists of the motor itself, and the attached solenoid. The solenoid is what takes battery power and delivers...