Engine shuts off after 10 minutes or when the car has warmed up

Hi,

What you described sounds like a bad crankshaft position sensor. Often, they will fail when they get hot. Do me a favor. Read through this link and let me know if it seems to mirror what you experience.

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

If you feel it does, check to see if there is spark to the plugs when it won't start. If there is no spark, this is my first suspect. Here is a link that shows how to check for spark:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

If you find there is no spark, here is a link that shows in general how to replace the sensor:

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

Here are directions specific to your vehicle for replacement:

Pic 1 shows location.

2002 Chevrolet Malibu V6-3.1L VIN J
Crankshaft Position (CKP) Sensor Replacement (7X)
Vehicle Powertrain Management Sensors and Switches - Powertrain Management Sensors and Switches - Computers and Control Systems Crankshaft Position Sensor Service and Repair Procedures Crankshaft Position (CKP) Sensor Replacement (7X)
CRANKSHAFT POSITION (CKP) SENSOR REPLACEMENT (7X)
REMOVAL PROCEDURE


pic 2

1. Turn OFF the ignition.
2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle.
3. Remove the right tire and wheel.
4. Turn steering wheel fully to the left.
5. Disconnect the sensor electrical connector.
6. Remove the attaching bolt/screw.
7. Remove the sensor from engine.
8. Inspect for wear, cracks, or leakage if the sensor is not being replaced.

INSTALLATION PROCEDURE


pic 3

1. Lubricate the O-ring with clean engine oil before installation and replace if damaged.
2. Install the sensor to the block.

NOTE: Refer to Fastener Notice in Service Precautions.

3. Install the CKP sensor attaching bolt.

Tighten
Tighten the bolt to 11 N.m (97 lb in).

4. Connect the sensor electrical connector.
5. Install the right tire and wheel.
6. Lower the vehicle.
7. Perform the CKP System Variation Learn Procedure. See: Vehicle > Programming and Relearning

______________________________________

I hope this helps. Let me know if you have other questions.

Take care and God Bless,

Joe

Replaced it already, still does the same thing.

Hi,

Okay, when it stalls and doesn't restart, try this. See if it starts for a couple of seconds using starting fluid. If it does, then we know it is a fuel related issue. If it doesn't, then we need to see if spark is lost to the plugs.

Here are a couple of links you may find helpful. The second one explains how to check fuel pressure, but the starting fluid should eliminate that issue. If we determine it is fuel related, then I will need you to check fuel pressure.

https://www.2carpros.com/articles/how-to-test-an-ignition-system

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Let me know what you find

Take care,
Joe

I’ve changed crank sensor fuel filter. MAS airflow, fuel pump, PCP valve and still the same. since I replaced the crank sensor it shuts off quicker like 3 minutes.

Hi,

Do you still have to wait after it stalls before it will restart?

Joe

Yes.

Hi,

You replaced just about everything. The only thing left is the ICM (ignition control module). It is what the coils mount to. What I would suggest is to remove the module and have it tested at a parts store.

Here are the directions for removal and replacement. The pics correlate with the directions.

______________________________

2002 Chevrolet Monte Carlo V6-3.4L VIN E
Procedures
Vehicle Powertrain Management Relays and Modules - Powertrain Management Relays and Modules - Ignition System Ignition Control Module Service and Repair Procedures
PROCEDURES
IGNITION CONTROL MODULE REPLACEMENT

REMOVAL PROCEDURE


pic 1

1. Turn OFF the ignition.
2. Disconnect all the electrical connectors at the ignition control module (ICM).
3. Note position of spark plug wires for installation and disconnect the spark plug wires from the ignition coils.
4. Remove the screws securing the coil assemblies to the ICM.
5. Disconnect the coils from the ICM.
6. Remove the ICM from the module mounting bracket.

INSTALLATION PROCEDURE


pic 2

1. Install the ICM on the module mounting bracket.
2. Install the coils to the ICM.

NOTE: Refer to Fastener Notice in Service Precautions.

3. Install the screws through the coils and the module into the module mounting bracket.

Tighten
Tighten the screws to 4.5 N.m (40 lb in).

4. Connect the spark plug wires as noted during the removal.
5. Connect the electrical connectors to the ICM.

______________________________________________

Let me know what you find. Note that I am recommending this check only if you lose spark when it won't restart.

Take care,
Joe

Still runs 5 minutes then shut off won’t start.

When it stalls and won't restart, is it spark that is lost?

Joe

Hi,

If you disconnect the MAF sensor, does it change anything? Also, at this point, we need to scan the can bus system. Here is a video that shows how it is done:

https://youtu.be/InIlnsjOVFA

Let me know what you find.

Joe

No, and now it won’t start at all.

After I changed the ICM it will not start at all.

Return the new module. It may be a bad one. If you totally lost spark after replacing it, it's likely bad. Or, reinstall the original module and see if it starts for a short time again.

Let me know.

Joe