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Ask Mike V. Your Own Question
Mike V.
Mike V., Auto Technician
Category: Chevy
Satisfied Customers: 28366
Experience:  25 years automotive experience, Certified Subaru Tech and Nissan factory trained.
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Keep stalling. It was and yes. 2002 suburban. Tried to crank

Customer Question

Keep stalling
JA: Is the check engine light on? Does the car stall at idle or when driving?
Customer: It was and yes
JA: What is the model/year of your Chevy?
Customer: 2002 suburban
JA: Are you fixing your Suburban yourself? What have you tried so far?
Customer: Tried to crank position sensor gas pressure sensor
JA: Anything else you want the mechanic to know before I connect you?
Customer: No
Submitted: 11 months ago.
Category: Chevy
Expert:  Mike V. replied 11 months ago.

Thank you for your question!
My name is ***** ***** give me a moment to review your question and type my reply. Thanks

Expert:  Mike V. replied 11 months ago.

Do you happen to know what codes are being stored?

Does it stall when idling?

Customer: replied 11 months ago.
No it only stall when driving
Expert:  Mike V. replied 11 months ago.

Does it fire right back up?
Also, any idea on the codes?

Customer: replied 11 months ago.
After about a minute
P0300 p0420
Expert:  Mike V. replied 11 months ago.

I would try pulling the front O2 sensor on bank*****it. See if it stops stalling, the code P0420 points to the catalytic converter and if it's plugging up when it gets hot it will cause the P0300 and stalling issue. Lot's of times the vehicle will idle without a problem even when it's blocked, but under load it will stall.

It may also need a tune up, some plugs and wires on it. If they are old it could be loading up with fuel causing it to shut down. Finally, check the fuel pressure, if the pump is weak it could cause this concern as well. This is if removing the front O2 sensor on bank 1 doesn't help anything.