Skip the auto shop - Our mechanics make house calls

Q: Car was driving fine but when I returned 30 minutes later it wouldn't start.

asked by on

I fitted a new starter motor over 2 months ago and I just bought a new battery 2 days ago. The engine is cranking, it just won't kick over. I then tried changing the spark plugs... still nothing! I have a feeling it's something electrical but I have no idea where to try next. Can anyone help me?

My car has 50000 miles.
My car has a manual transmission.

This may be related to many different possibilities, some of which may be related to a lack of spark and some of which may be related to a fuel delivery problem or a combination of both. For example, if the ignition coils, crankshaft position sensor, spark plugs, spark plug wires or ignition module are faulty, this may cause the motor to not produce the spark needed to ignite the fuel in the motor. If there is a fuel delivery problem, this may be related to low fuel pressure, faulty or dirty fuel injectors, a faulty or dirty idle air control valve (this relays information about air intake to the computer which makes fuel adjustments), or potentially a faulty fuel pressure regulator or fuel pump. Fuel delivery problems will typically not allow the proper amount of fuel to be delivered to the cylinders which results in a lean fuel condition which can cause backfiring or simply cause the motor not to start as a result of fuel starvation. I would recommend having an expert from YourMechanic come to your location to diagnose your no start problem.

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
  1. Home
  2. Questions
  3. Car was driving fine but when I returned 30 minutes later it wouldn't 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: When started it struggles to idle and cannot even rev.

Hello. This can be caused by a few different things. It can be a sensor problem, an internal engine issue, or just need a tune up. I usually start by scanning the computer for any codes. If there are codes,...

Q: My car won't start - 2011 Hyundai Accent

There are many factors that may cause a vehicle not to start, especially after sitting for a long period of time. First, you will need to determine if there is any power to the car at all (i.e. do the...

Q: Should I buy a car a 2005 kid spectrum with the timing tensioner needing to be replaced

The timing belt tensioner on any engine should be replaced whenever the timing belt is replaced. A tensioner that needs replacement is not really a reason to pass this vehicle by if it is in good condition and the price...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
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.