Q: My car is having starting issues - 2002 Hyundai Sonata

asked by on

Figured I would give this a shot. I drive my car a lot and it's not in all time best condition. But, since it has been getting colder out when I first start my car it starts but the rpms drop and it turns off. ill try to give it a little power but if I give too much I get a knocking sound from the engine. Eventually I'll get it I t up enough that it stays on but usually when I first go to drive I press a little harder because it doesn't want to go. Hoping somebody can give me an explanation on what to do before I put it back in the shop! Thank you in advance!

My car has 255460 miles.
My car has an automatic transmission.

Hi there. From the description you have provided, your vehicle’s start and stall may be more serious due to the knock you hear. Assuming the engine does not have a mechanical problem (e.g., collapsed or worn piston skirt, connecting rod bearing failing, oil pressure loss), it could be the fuel pump failing to produce enough pressure when cold.

Low fuel pressure could produce a knock if detonation is occurring from a lean condition. A fuel pressure test when cold could prove the fault. A bad or dirty idle air control valve could cause the stall but not the knock. I recommend having your vehicle’s [starting and turning off](https://www.yourmechanic.com/services/car-starts-and-then-dies-inspection diagnosed and repaired by a certified technician, such as one from YourMechanic.

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
  1. Home
  2. Questions
  3. My car is having starting issues - 2002 Hyundai Sonata

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: Car knocking after repair

Often, when concerns follow recent repairs, the most recent repairs must be taken into question first. Knocking engine noise is never a good sign, but not always a death sentence either. If the knock gets louder or faster with engine...

Q: Q: How do I scan through a CD?

The scan feature helps you figure out which track you want to listen to by playing you snippets of each track. To turn on the feature, press the Scan button. After pressing this button, the sound system will play the...

Q: Engine? New car? Greedy mechanics? What's the real deal?

Hi there: We strive to take the high road here at YourMechanic.com. Without being there to inspect your 2004 Dodge Intrepid, it would be irresponsible for us to assume what might be wrong. However, if you're looking for a fair...

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...