Will no start

Tiny
MINDICOSBY
  • MEMBER
  • 2005 CADILLAC STS
  • V6
  • AUTOMATIC
  • 130,000 MILES
My car has a push start. It will continuously crank but never start. It is not throwing any bad codes when hooked to scanner, fuel pump is good, has gas. What could be wrong?
Wednesday, August 8th, 2018 AT 10:44 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi and thanks for using 2CarPros.com.

If you checked and the fuel pressure and system is working correctly, then I would suspect an a problem with ignition spark. Interestingly, the crankshaft position sensor can be faulty and not set a code. If it is not working, you will not get spark and the engine will not start. Take a look at these links. They discuss symptoms and how to check and replace the component.

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

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

If you find the sensor is the issue, here are directions specific to your vehicle to replace it.

_______________________________________________

CRANKSHAFT POSITION (CKP) SENSOR REPLACEMENT
CRANKSHAFT POSITION (CKP) SENSOR REPLACEMENT

REMOVAL PROCEDURE
- Turn the ignition OFF.
- Raise and support the vehicle. Refer to Vehicle Lifting.
- Reposition the wiring harness heat shield to obtain access.
- Disconnect the crankshaft position (CKP) electrical connector (3).
- Remove the crankshaft sensor bolt.
- Remove the crankshaft sensor.
_________________________________
INSTALLATION PROCEDURE
- Install the crankshaft position sensor.
- Install the crankshaft position sensor bolt.
NOTE Refer to Fastener Notice in Service Precautions.
Tighten the crankshaft position sensor bolt to 10 N.m (89 lb in).
- Connect the CKP electrical connector (3).
- Install the wiring harness heat shield to the oil level indicator tube.
- Lower the vehicle.

________________________________

The attached pictures correlate with the aforementioned directions.

I hope this is helpful. Let me know if you have other questions or need help.

Take care,
Joe
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Wednesday, August 8th, 2018 AT 7:30 PM

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