Q: Turn key to start long start time occasionally changed fuel pump still hesitate to start

asked by on

My car start occasionally hesitate to start changed fuel pump

My car has 143354 miles.
My car has an automatic transmission.

Hello. Your no start condition can be caused by a number of things. If you changed out the fuel pump I am assuming that the engine cranks over fine, but it just won’t start at times. From my experience with this vehicle it is usually a bad crank position sensor or a bad shut down relay.

I typically install a scan too and watch the crank sensor signal when this occurs. If it is not there then I replace the sensor. If it is, then I check the shut down relay to see if it is functioning and receiving power. If it is not, then it may need to be replaced. If both of those are fine it may be a bad ignition switch, or even a computer failure, which I have seen a few times. If you need to have this diagnosed, consider YourMechanic, to have a certified mechanic come to your home or office to diagnose why your car is hard to start.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Turn key to start long start time occasionally changed fuel pump still hesitate to start

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: Hesitates going into gear from start then ok

What you are describing may be a result of a faulty speed sensor, potentially low transmission fluid or a even a faulty transmission control solenoid. As your vehicle travels down the road, the computer analyzes data being sent by vehicle...

Q: I had my transmission lines re done now my car heat stop working so I put a new thermostat in now the heat works but now the car o

You should have the transmission checked to see if the cooler is leaking inside the radiator causing the transmission fluid to get into the radiator coolant. If it is then replace radiator and flush system.

Q: Overheating car after running for 30 minutes

Hello there, many different faults will cause your 2002 Chrysler Sebring to overheat after running for 30 minutes. The most common faults are the water pump, radiator, air bubbles in the coolant, or airflow ducting to the radiator. In many...

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 Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.