Intermittent stall while driving issue

GEORGE A. HELS

MEMBER
2005 CHEVROLET CLASSIC
4 CYL
2WD
AUTOMATIC
118,000 MILES

Tried neutral and starting while rolling. I turned the key off, back on and she starts, runs fine. I just finished a cat and resonator problem, as well as both O2 sensors. Got factory plugs on both, and she's new cat back. Throwing no codes or check engine light.
Thanks in advance for your help!

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,875 POSTS

Hi,

When this happens, does it feel like the key is turned off, or do you feel a loss of power as if it's running out of fuel?

Interestingly, since there is no code, which leads me to think the crankshaft position sensor could be faulty. When these sensors begin to fail, heat adversely affects them. The internal coil in the sensor expands and loses contact allowing the engine to stall. Also, based on design, it may or may not set a code.

Take a look through this link and let me know if you feel it mirrors what you experience:

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

Let me know.

Joe