Skip the auto shop - Our mechanics make house calls

Q: Tugging after startup or accelerating from a stop light

asked by on

Hi. My car has gone around 120,000 miles. It is a well-maintained car but it recently started having issues with tugging and jerking movements. It started happening out of the blue and it occurs on taking off. There are no dashboard lights on. When I try to accelerate from a stop light, or after turing the engine on, the strong tugging movements happen. When I reach around 40 mph, and I slowly give it gas, the jerking stops. But, at that point, the engine seems to be sluggish. At around 80 mph, the car runs great. I would appreciate if you could give me some advice on how to fix this issue. Thank you in advance.

A: Hello. Most of the time, if this is occurri...

Hello. Most of the time, if this is occurring and there is no Check Engine Light, it is because there is a transmission related issue.

To diagnose this, I usually start by checking the transmission pressure to see if it is failing internally. If the transmission pressures are low then it needs to be rebuilt. If they are fine, then I monitor the inputs from the air flow sensor and the throttle position sensor to see if the readings are right as both of those will cause this as well. If you need help with the checks and repairs, consider reaching out to a certified mechanic who can come to your home or office to diagnose and fix the acceleration issue that you're experiencing.

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: How do I adjust the text scroll settings?

When the text scroll setting is turned on, then a long file name will continuously scroll across the sound system display. When the setting is turned off, the name will scroll once, and then stop. To turn on or turn...

Q: Will not accelerate beyond 65 mph

All vehicles have serviceable fuel filters, in fact your vehicle has 4 or more such filters. That is, EACH fuel injector has its own miniature filter basket so there are 4 potentially pluggable filters right there. There are some obvious...

Q: Car idles rough, hesitate from a stop, shuts off going uphill

Hello there, this is a common fault on the Chevy K2500. There are many different possible causes for the engine to idle rough and have poor gas milage. The most common are the spark plugs, plug wires, cap & rotor,...

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...
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...