Q: Jeep will not start when hot

asked by on

Jeep is cold starts up run to different stores park and shut off come back will start when hot take 20 thru 30 minutes to start up

My car has 170000 miles.
My car has an automatic transmission.

With starting conditions it’s important to differentiate between a crank no start and a no crank condition. These are two very different conditions with very different causes. A no crank is when the motor doesn’t turn. A crank no start is when the motor turns but won’t start. Both can be the result of failing components that can’t handle the heat.

With a no crank condition, this is usually the starter. The starter sits very close to the motor and gets very hot. It is not in use when you are driving but it is steadily getting hotter as you drive. Once you stop an attempt to restart the car, its internal connections won’t allow the flow of electrical current. This is a factor of electrical theory which I won’t go into depth about here.

With a crank no start condition, you have a similar condition with heat but the affected component will be a module or other electrical component. All electrical components suffer from this weakness. To determine what has failed will require the recreation of the symptom. This can be hard is a shop environment. Driving the equivalent distance to create the condition can be time consuming and costly. Problems can’t be diagnosed when they are not actively failing.

If you’d like some help with these checks, I recommend having a certified mechanic, like one from YourMechanic, perform an inspection of your no start condition.

Good luck!

Was this answer helpful?
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. Jeep will not start when hot

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: Car won't start and shakes while turning the key - 2003 Saturn L300

Hello. These lights can mean that there is a serious issue going on or that there may be an electrical malfunction. I usually check and see if there is oil pressure and check to make sure that the charging system...

Q: Key turns in the ignition but car won't start

The remote may need the battery replaced. Try another good remote, or change the batteries in the remote. If this does not work, then you may have to get the antitheft system tested using the dealer's scanner. This will test,...

Q: Oil in the coolant tank

Hi, thanks for writing in. If you have coolant in the engine oil showing on the oil cap, then you likely have a blown head gasket. The oil in the coolant is most likely from the blown head gasket getting...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
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.