Q: My car has had trouble starting for the past 3 months. It cranks but it doesn't turn over in the morning.

asked by on February 07, 2018

My car has had trouble starting for the past 3 months. It cranks but it doesn't turn over in the morning. After about 10 minutes, it eventually starts and is fine the rest of the day. The past month, it has been a stalling at red lights and in traffic (while still having a hard time starting in the morning). I turn off my car and turn it back on and it runs fine. I have taken it to multiple mechanics and the dealership a few times but they cannot diagnose the problem!

My car has 84000 miles.
My car has an automatic transmission.

There are a number of things that may cause this to happen, however based on what you are describing it sounds like you may have an issue related to maintaining the proper fuel pressure both while starting and sitting at red lights. The fuel pressure regulator is a device which controls the pressure of fuel supplied to the fuel injectors on an engine. This works by bleeding off a portion of the fuel flow to the injectors from the fuel pump to control the fuel pressure. Fuel is pumped from the fuel tank to the fuel rail by the fuel pump. The fuel pressure regulator is normally mounted after the fuel rail to ensure that the fuel rail has priority in fuel flow. The valve in the regulator controls the amount of fuel that is bled from the fuel rail by opening an outlet port to allow fuel to flow back into the fuel tank. All injectors need a pressure difference between the inlet and the outlet of the injector to spray fuel into the combustion chamber. This is called the base pressure. If this is not happening correctly, you will experience intermittent fluctuations in starting and maintaining the engine running as you have described. I would suggest having a professional from YourMechanic come to your location to diagnose and inspect your vehicle.

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

Why does my check engine light still come on in my 2014 Hyundai Accent even after changing the fuel cap

Hello. The gas cap will not repair the issue unless that is the problem. Depending on what code is coming up will determine what is needed. I would start by scanning the computer for codes first to see what may...

Door not opening from inside or outside

In the theft attempt, the internal mechanisms attached to the door handles may have become jarred loose, or broken. This will make the repair a little more difficult, but not impossible. Have a trained mechanic inspect the door and repair...

Engine idle fluctuates

This may be a sign of a vacuum leak. A vacuum leak can be one of the most frustrating and difficult problems to diagnose. High idle speed is a common sign and stalling is another. Confirmation of an engine vacuum...

Related articles

A Buyer’s Guide to the 2012 Hyundai Sonata Hybrid
When When Toyota first introduced the Prius, the idea seemed to be that all hybrids and electric cars had to have their own specific models and that they couldn’t look like normal cars. A lot of consumers weren’t too thrilled...
The Best Used Cars to Buy If You're a Construction Worker
If If you're a construction worker, you don’t have to worry about hauling a whole lot of supplies and materials to the site – that’s the boss’s problem. As long as it’s big enough to hold your tools (and most...
The Best Used Cars to Buy If You Just Retired
Here’s Here’s a cruel, hard fact – car manufacturers no longer target seniors. Instead, they devote their time and energy to appealing to the 18-45 demographic. Still, some features make certain cars more suitable for older drivers. We have...