Skip the auto shop - Our mechanics make house calls

Q: Truck seems to hop at certain rpm

asked by on

My truck starts no prob sometimes it runs rough and seems like it will stall but it doesn't and then let's say accelerating on the highway from approx 50-60 mph the truck hops basically stutters and shakes till i accelerate strongly snd get the rpm s above 1.5 then it cruises fine ... It's almost like the drive train gives a direct example of what the engine is doing please help no code shows up from local mechanic and it doesn't always do this.

My car has 73000 miles.
My car has an automatic transmission.

Hello. From what you describe, it would appear that your vehicle is experiencing performance issues, perhaps misfires under heavy loads. If the engine is misfiring under heavy load it will most definitely be felt through the transmission and chassis. This can be caused for many reasons.

A few common causes are a weak fuel pump, a faulty mass airflow sensor, or faulty ignition components. I would recommend checking the fuel pressure and going from there. If no codes are present, I would recommend having a professional technician drive the vehicle to replicate the symptoms and diagnose the jerking issue.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Van jerks, engine loses power, no acceleration - 2008 Hyundai Entourage

Hey there. A good start would be to have the car scanned to see what code has set in the computer and turn the Check Engine Light on. Your problem could be many things, from a problem with the drive-by-wire...

Q: 2007 f150 will stall during idle

What you are describing sounds like a dirty or failing idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and...

Q: Replaced output sensor 1wk ago. Y is reverse gettin so hard to do. Scanner shows need o2 b1s1& iat still

Hi there. It's quite possible that you're chasing a false sensor issue and that the transmission problems might be caused by a faulty electrical harness connected to the sensor itself or obstruction of transmission fluid inside the hydraulic lines. The...

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...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...