Skip the auto shop - Our mechanics make house calls

Q: Truck shakes when accelerating from a stop.

asked by on

My truck starts shaking when I accelerate from a complete stop. Once I get going it's fine. When I lightly press the gas it shake and when I really press the gas it revs high and barely moves like it's stuck in gear. I put a bottle of Lucas in there last night and it shifts fine, it's just getting going is the issue.

My car has 200000 miles.
My car has an automatic transmission.

A: Hey there. This may be a sign of a dirty or...

Hey there. This may be a sign of a dirty or failing mass air flow sensor or potentially low fuel pressure. The mass air flow sensor monitors the air intake as it is mixed with fuel prior to being injected into the motor.

As this reads, the air intake it relays this info to the car’s computer which then makes fuel adjustments accordingly. When this is not working properly, this can cause an unbalanced load of fuel and air to be supplied to the motor causing poor acceleration as you describe.

This may also be related to low fuel pressure, which may also cause this type of hesitation in accelerating due to the lack of adequate fuel supply to the motor as you accelerate. If you would like to have this taken care of, a certified professional from YourMechanic can come to your car’s location to inspect the shaking and acceleration problem and proceed with the proper 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: What should I do to maintain the child restraints and seat belts?

While your child restraints and seat belts shouldn’t need much in the way of maintenance, it is important that you know how to care for them properly. After all, the safety of your family hinges on them. Here’s what you...

Q: Alarm system not working correctly.

These older Buicks have a security chip in the ignition key. Often times these chips will get worn and not make a good connection or the wires on the ignition switch that read the chips will break. I would suggest...

Q: Car not going after turning.

If this only occurs when turning it is commonly a problem with the transmission. The differential assembly in the transmission locks up and causes the vehicle to act this way as the side gears bind after turns. You should enlist...

Related articles

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...
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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...