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・Fair and transparent pricing

Get a quote

What others are asking

Q: Sometimes wont start and sluggish to accelarate.

Hello, thank you for writing in. You are correct in thinking it may be fuel related. The easiest way to narrow in on the fuel system is to pressure test it. Then you know it is the pump, filter, or...

Q: Where do I find the engine number in a 2012 Nissan Altima?

The engine number is similar to the vehicle identification number on your car, but serves to identify the engine, where it was built, and when. You won’t need it for basic car-related paperwork, but you may need it in some...

Q: Something is draining the new battery

Hi there, thanks for writing in. Once the car's engine starts, the job of the battery is finished as the alternator takes over the responsibility of powering all components and accessories on the vehicle. In some cases, a new alternator...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.