Skip the auto shop - Our mechanics make house calls

Q: Chevy Impala 2003 stalls at stops

asked by on

I have a Chevy Impala 2003 that stalls only at complete stop. I've changed the IC, fuel pressure is good; changed both crank sensors, PCM; there is no vacuum leak. I can drive it from here to the end of the world, when it stops, no check engine light.

A: It’s probably time for you to see a profess...

It’s probably time for you to see a professional mechanic. You don’t have a Check Engine Light but that’s only the beginning to figuring out the problem on most cars. Mechanics have dealer-level scan tools and when you hook them up, you can check what’s called mode six data. The scanner will be able to show live data and all recorded data.

If your car has been stalling out at stops, it becomes recorded data which shows the problem area. In mode six data, when we use the good dealer-level machines, the information is interpellated so that the mode six data will be green, yellow, and red. Green means good, yellow is iffy, and red is bad.

The first thing a mechanic would do is check out all of the colors of the data. If red is seen, that’s where you start and figure out what the problem is. So, if you don’t have a dealer-level scan tool, you’ll often need a mechanic who can at least analyze the info. You don’t have to pay them to fix it. Pay them to analyze it. Because, you’re in the twilight zone right now and it takes a real pro to figure out what is happening.

Feel free to reach out to a certified mechanic who can diagnose your Check Engine Light and allow you to have a better idea of what you’re dealing with. Once the issue is found they can help you repair the issue as well if you need the assistance.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: I have a P0236 code and I can't seem to find the problem

Hi there. In most cases, the OBD-II error code P0236 indicates that the turbo boost pressure sensor A is slower to respond to changing pressure due to deterioration with age. When the boost pressure sensor can't catch up to the...

Q: Car stalled out unexpectedly

Hello. This could happen for several reasons. Your car could have gone into a temporary limp mode because of transmission malfunction or because the battery and/or alternator has low voltage causing the car to stall. This problem should be addressed...

Q: I'm wondering why is my car slow to accelerate and gets up to about 40mph before the mph hand falls down.

Hi there: Traditionally, vacuum leaks or obstructions in fuel flow tend to cause acceleration issues. This could be triggered by a bad mass air flow sensor, EGR valve or clogged or dirty throttle body that simply needs to be cleaned...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...