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

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!
  • Home
  • Questions
  • 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: My 2010 kia blower fan stopped working but was fine last week. This occurred a few times in past. Works fine then stops blowing ag

The blower switch and the plug connection on the back of the switch, as well as a faulty blower motor are likely, too. I would check the blower motor first as you can easily power the motor directly to see...

Q: Charging system

Hi There, This sounds like a faulty alternator that is not properly maintaining a charge on the battery. I would suggest having the alternator checked to determine if it is receiving the proper amount of voltage from something called the...

Q: My car takes too long to start I have to keep my foot on gas pedal to start

Based on your description, it sounds like you may have a clogged fuel filter or a weak fuel pump. I would recommend having your fuel pressure tested at the fuel filter and the fuel rail. If the fuel pressure is...

Related articles

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...
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...
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.