Q: Car stalling.

asked by on

I replaced icm and Coil's crank sensor plugs wires and, the car still stalls when it gets hot, what else can be wrong?

My car has 200000 miles.
My car has an automatic transmission.

A: You have definitely covered some of the obv...

You have definitely covered some of the obvious possibilities. Most of the time the ICM would fix this problem. There are a few other things that can do this. Bad connections at connectors and the PCM to start. But I would not run out and swap these parts just yet.

I would connect a scanner and watch all the data, record the data and go for a test drive to recreate the problem. Keep in mind, a scanner isn't the same as a code reader that the local parts store uses to scan for codes. Most of the time, this method will reveal the failure when it gets hot, but not always.

In the most difficult cases, I connect a fuel gauge and tape the gauge to the windshield to watch what it does. I also have a noid light and spark tester at the ready. If your not aware, a noid light is used to check for injector pulse from the PCM. Once I got it to fail and hopefully figure out what is missing when it dies, I would take appropriate steps to figure out why. If it's fuel pressure, I make sure the fuel pump is getting power from the relay. Relays can fail when hot just like an ICM. If it doesn't have injector pulse, I would suspect the PCM, but I would test the PCM at the PCM. This could easily be a wiring problem in a harness.

The main thing that has to happen next, is to figure out what is missing when it dies by utilizing the tools that best test each system. If you'd like to get this fixed, get some help from a professional mechanic who can perform these checks to accurately diagnose your stalling problem. Once this is done, the necessary repairs can then be made.

Good luck.

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・Save up to 30%

Get a quote

What others are asking

Q: Oil light

You would need to have the oil pressure tested with a gauge to see if the pressure is within specifications. A sending unit may be bad or you are low on oil pressure. The reason for this could be anything...

Q: Air shock system not working

Replacing the air suspension in your Buick with normal shocks is a fairly straightforward process of repairing the suspension system with little headache. Enlisting the assistance of a certified mechanic, like one from YourMechanic, can make this process even easier....

Q: Still getting code P0300 after parts change

It sounds as though you have done an almost complete tune-up of the vehicle. However, there may be a few components left to check. A clogged fuel filter can restrict fuel volume causing a lean condition, and set random...

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...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.