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 pro...

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

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: What can cause my oxygen sensor to get damaged during a oil change and fuel system cleaning?

Hi, thanks for writing in. The oil change would not damage an oxygen sensor. The fuel system cleaning could possibly cause this condition, but it depends on the cleaner type and mixture. I would recommend having an expert from YourMechanic...

Q: Won't start say running

Code 42 is indicative of an auto shutdown relay problem. This can be caused by a wiring issue to the fuel pump - most likely a short or broken wire. Sounds like it's time for an electrical diagnosis. A professional...

Q: How to fix my transmission

Hi there. In order to answer your question, we need a bit more information from you such as what symptoms you're experiencing, if your transmission is leaking fluid or if it is working at all. Let us know what problems...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...