Skip the auto shop - Our mechanics make house calls

Q: Occasional shaking and sluggishness while accelerating

asked by on

The truck has some problems that happen after I start it up in the morning and increase the speed. If I stop at the traffic light, there is shaking and loss of engine power during acceleration. After that, the vehicle runs great and it could be days without any issues. This happens especially when the weather is damp or foggy. At the shop, they couldn't find what the cause is. Do you have any idea. I appreciate your help.

A: If your vehicle is shaking and losing power...

If your vehicle is shaking and losing power, the most likely cause is fuel or ignition system related. I would recommend having the fuel pressure checked by a qualified professional to determine whether or not the fuel pressure is within specification.

If the fuel pressure is low, this can be due to a weak fuel pump or clogged fuel filter and could also have an affect on your problem.

If the ignition system is having issues, this can be tested with an ignition tester to determine if spark is going to the places that it should. I would also recommend having this test done by a professional as it involves high voltages and injury from shock may result. It is very likely that the cause of your issue will be found during one of these two tests.

If you decide to get this fixed, contact a certified mechanic who can perform these two checks and fix your cars performance at your own convenience.

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: Truck stops taking gas, but engine stays running

Hey there. The engine is in failure mode and will set a code in the computer memory. You need to have the vehicle scanned to see what code may be in the computer memory. Once the code is retrieved, then...

Q: Car only cranks but won't start

The battery is the most likely cause of any no start condition. Even if the battery is on the border it may not have enough power to start the car, but the accessories may turn on. Other causes are the...

Q: Headlight assembly not working

On a vehicle such as a Porsche, it is likely that there is a control module for each of the headlight assemblies. A control module is like a computer that controls a particular system. If all of the lights on the driver side...

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.