Skip the auto shop - Our mechanics make house calls

Q: Ignition problem and car won't start - 2002 Jeep Grand Cherokee

asked by on

Won't start sometimes after driving somewhere ....wait approx 10-30 min and it will start . Replaced relay ...same problem

My car has 180000 miles.
My car has an automatic transmission.

Hi there. I would need to know if, when it will not start, the engine cranks over or you get nothing. If it will not even crank over, then most of the time this is caused by a failing starter. If it is failing, the heat from the engine running can cause it to bind until it cools again.

It can also be a bad positive battery cable that has a lot of internal resistance. I usually do a voltage test at the starter and work through the circuit from there until I find the problem. If the engine is cranking, then I usually test to see if it is lacking fuel or spark or both. It may be a fuel pump issue or a crank position sensor. I would use a scan tool first to check for codes and to see what the sensors are reading as that should identify the issue.

If you want to have this intermittent starting issue checked out, consider a professional mechanic, such as one from YourMechanic, who can come to your home or office to determine why the car is not starting.

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

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: Coolant leak.

Hi there. There are a number of areas that the coolant can leak from on your vehicle. If the coolant only leaks when the engine is running then it is typically a water pump. If it is leaking when the...

Q: No idle after ignition, unless holding the throttle.

Hi there. I can see how you're stuck; as this one is tricky to diagnose. There are three things I would do first before removing anything else. First, download all OBD-II codes with a professional digital scanner; perhaps they will...

Q: Engine turned off but inside of car still on, now engine won't turn back on.

Hi there. The symptoms you're describing with your boyfriend's 2002 Grand Cherokee appear to be related to a broken or worn out ignition switch or relay. The ignition switch on the inside of the steering column is attached to multiple...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...