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?
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. Ignition problem and car won't start - 2002 Jeep Grand Cherokee

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: Codes p0101, p0131, p0137, p0151 & p0327 I guess I'm asking would replacing the ECM solve the problem? 2002 Chevrolet Blazer

Hello - the codes you list (besides the P0101 for the MAF) reference problems with the oxygen sensors and a knock sensor (P0327) for your engine. These are normal higher mileage maintenance items, and do NOT require replacing the ECU....

Q: Transmission flush vs fluid exchange and filter change 2012 Jeep Grand Cherokee

Hello - the "to change, or not to change" transmission fluid is a somewhat controversial discussion, especially in the day of claimed "lifetime lubricants". In my experience, when you plan to keep a vehicle well past 100K, it is a...

Q: catalytic converter going bad does it need to be replaced?

The catalyst should be replaced as soon as possible if it is bad. The backpressure on the engine will cause the engine to run with less power and may overheat the engine valves resulting in engine damage. the catalyst can...

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.