Skip the auto shop - Our mechanics make house calls

Q: The car starts to stall when I accelerate at high speed.

asked by on

I tried to pass a car on one lane St Rd 70 increasing speed from 70 to 85 as I accelerated the car lost power as if it was going to stall. Happened twice on same trip. Increased speed from 65 to 75 on 95 and same thing happened. Very scary. I read this is an issue with this car and may be the cam and crank sensors???

My car has 50200 miles.
My car has an automatic transmission.

A: I would first check to see if the PCM has s...

I would first check to see if the PCM has set any diagnostic trouble codes, including pending codes. Codes can be downloaded and evaluated by YourMechanic in the context of a Check Engine Light diagnostic. The camshaft and crankshaft position sensors are relatively easy to test so those can be ruled in or out. For your vehicle, I do not see unusual reporting though (i.e., high frequency) of these sensors being implicated in hesitation.

If the sensors test good, and no codes were set, the diagnostic would move to consideration of the usual list of suspects: vacuum leaks, hose connections, PCV, EGR stays open, ignition system, including spark plugs, wires, coils, engine timing, fuel supply including pressure, fuel pump, fuel filter, pressure regulator, clogged injectors or filter, and EFI components such as air flow meter, water temp sensor, air temp sensor, throttle position sensor, injection signal. The best thing to do is schedule an engine hesitation diagnostic. At the conclusion of that diagnostic, you will have your root cause and the Mechanic will explain the required repair and the cost. If you have further concerns or questions, by all means don't hesitate to re-contact us.

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・Save up to 30%

Get a quote

What others are asking

Q: Car hesitates, stalls at idle, P0102 code

Hello. This can be caused by a number of things. I usually install a scan tool first to see what the sensors are reading. Most of the time this is caused by a leaking intake manifold gasket. This is a...

Q: My car does not start.

Hello. Many things can cause a crank-no start condition. Lack of fuel is one and can be caused by a failing fuel pump, clogged fuel filter, or clogged fuel injectors. If you say that you smell fuel, then it could...

Q: A/C is going crazy. The reading of the "outside temperature" resets itself. 2004 Land Cruiser

Hello - most likely, the outside air temp sensor has been damaged or ripped out. (They are often mounted down low just behind the front bumper, which makes them vulnerable to all sorts of things.) When the sensor is removed,...

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...
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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...