Skip the auto shop - Our mechanics make house calls

Q: My jeep will sometimes start and sometimes it wont.

asked by on

My jeep will start and sometimes it won't. Recently it won't start more often than it will. It sounds like its trying to turn over but it won't crank. The lights and radio work, so I know the battery is fine. When it does drive, it seems like its having trouble switching into a higher gear or like it skips a gear. What could cause this issue?
My car has an automatic transmission.

A: Hello. Even though your lights and radio ar...

Hello. Even though your lights and radio are still working, the battery may still not have enough voltage to engage the starter. Use a multi meter to ensure your battery is testing at least 12.6 volts. Next, test your alternator and make sure it is reading 13.8 - 14.2 volts. The only downside to testing the alternator is that you will need to have the vehicle running. If you can start the vehicle, test it. If not take your alternator to a local parts shop, and they will be able to test it for you. If the issue is beyond your battery and alternator, check your starter. Listen closely when you turn the key. Do you hear a single click? If so, the issue is likely your starter. A quick diagnostic trick for your starter is to use a metal object, like a small hammer, and knock on your starter as someone turns the key. Most of the time, this will start your vehicle. If you further assistance, enlist in a qualified professional. If you need help, have a technician from YourMechanic come to your home or office to replace your starter.

Was this answer helpful?
Recommended services
Get a Quote

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!

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: I have Chrysler 300c. Battery light came on, changed battery and alternator but power still getting drained and battery light still comes on.

Hi, thanks for writing in. This may be a sign of a failing starter relay. The starter relay is a small unit near the starter that directs power to the starter from the battery. When this fails, it may cause...

Q: Oil pressure falls when stopping

With the potential for extremely low oil pressure in your vehicle, caution is advised when driving due to the potential for long-term damage. The most common causes of this issue is the oil pressure gauge itself being faulty, improper oil...

Q: No start

Hi there, thanks for writing in about your 1999 Buick Park Avenue. You may have a bad ignition module and coils if you find that you are getting a crank and cam sensor, and no fire from coils. You should...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...