Skip the auto shop - Our mechanics make house calls

Q: Truck accelerated past 35 and started sputtering

asked by on

My truck started accelerating past 35 earlier this week and then it started shuddering, with that feeling a vehicle has when it doesn't have any gasoline. I could not find anything visibly wrong in my truck and the sputtering/shuddering problem did subside as fast as it started. However, several other problems developed when my truck first developed the problem. There is now a vibration in the gas pedal (only when I accelerate) and the pedal has become resistant to touch. The truck is normal in its idling and still drives, but there is less power and it sounds rougher than before. Two weeks ago I replaced the PCV valve and I have been adding Techron for three weeks. I checked the butterfly valves in the carburetor and found them to be perfectly clean. The distributor looks in good condition and the distributor cap has not moved. I have replaced the air filter with a new one, as well as the fuel pump, fuel filter, fuel sock, and the gas tank clean when I installed the fuel pump. I saw some minor cracks in the air hoses, but they did not look serious. All of this was done within the past 4 weeks. What is your advice for my next step in repairing my truck?

Hello there, thank you for asking about your car. The first thing that comes to mind is a secondary ignition misfire (spark plugs, wires, etc.). An ignition misfire is most noticeable under load and can be felt as a shudder if it is severe. Another thing comes to mind is torque converter shudder, which occurs right before or after converter lockup. Modern vehicles have a lockup torque converter to improve fuel economy. Of course, there are many other potential causes for your problem as well. Anything from a worn u-joint to a failed engine mount could cause the problem. The only way to know for certain is to have your vehicle inspected by a trained professional, such as one from YourMechanic, who can inspect your sputtering problem and make any necessary repairs.

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: Lose power in eceleration or RPM gage don't go into gear smoothly

Hello. A loss of power can be caused by many things. If you have a Check Engine Light and code for an oxygen sensor then I would start there. A faulty oxygen sensor on either bank can cause all sorts...

Q: Car is making a loud noise coming from the air box because when u apply a little pressure the noise goes away and I just got a new

Hello, thank you for writing in. You are absolutely heading in the right direction. If you were to look at a diagram of the filter housing you would see it simply runs to the vents up front. If you can...

Q: I've got a P0507 code, what can I do?

Hi there. It sounds like the idle air control valve is stuck at the high idle position. The idle air control valve is located on the throttle body assembly and allows air to bypass the throttle plate to control the...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...