Q: Engine dies, runs rough and stalls

asked by on

After driving 20 miles -"bucking" and engine shuts off. Engine very hot to touch , but NO check engine sign or temp. increase. New battery, and oil change. Was told cracked radiator and, or catalytic converter, but do not trust diagnosis as-- NO fluid leaks, and coolant is full.

My car has 75000 miles.
My car has an automatic transmission.

This may be a sign of a failing mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected into the motor.

When this fails, this can cause an imbalanced air/fuel load to be supplied to the motor which often times results in the engine starving for air or fuel. This is what causes the hesitation or loss of power you describe. This can also cause the engine to struggle to idle for the same reason.

A cracked radiator would be causing the car to overheat from the loss of coolant. The catalytic converter may also be a possibility, however this would normally cause a Check Engine Light to come on and the car would have more of a sluggish feeling to it rather than a bucking response as you describe.

To avoid any unnecessary repairs, I would suggest having a professional from YourMechanic come to your home to diagnose your stalling issue and replace this sensor if necessary.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Engine dies, runs rough and stalls

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: My vehicle stalls while driving at 50-60 mph after running 10-15 minutes. Restarts immediately on start up.

Hi there. Check the ignition coils and see if they are getting hot. Also, check the spark plugs and wires and see when the last time they were replaced. Old spark plugs will rust up causing a resistance and a...

Q: Engine stumbled, reduced power/speed, & warning light on

Hi there. This can be a coil or a number of other things. Since the check engine light came on the computer needs to be scanned for codes. I typically scan it first to see what is going on. From...

Q: How do you manually shift the automatic transmission?

While your automatic transmission is capable of shifting all on its own, you might want to take matters into your own hands. You can actually drive your Nissan like it’s a stick shift, even if you don’t have a manual...

Related articles

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.