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

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: Intermittent performance issues

Hello. From what you describe it would appear that your vehicle may be experiencing performance issues, possibly misfires. Symptoms like these can be caused by a wide variety of reasons. Problems ranging from issues with the fuel system, to a...

Q: Cut off while driving

Based on the information you provided, it does seem like your clutch switch may be faulty. You may have another cause for the no-start. Read the DTC's (Diagnostic Trouble Codes) to determine if you have another component that needs testing....

Q: Knocking/ticking noise before it died told that engine has no compression also told may be timing chain/belt,worth looking at ?

Hello, the damage to the engine could cost a lot money. When the timing chain breaks, the result can be bent valves and damage to the cylinder head. The effective repair would be to replace the engine assembly. With...

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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...