Skip the auto shop - Our mechanics make house calls

Q: Sporadic loss of power when accelerating

asked by on

Issue started Thursday June 2nd, 2016. Was accelerating from being stopped at a stop sign and noticed it did not have the initial power from the engine like it normally does. Pressing down on the accelerator it would gradually get up to speed and then once it did, it kept the power and speed. Got to where I was going. Had it shut off for about 3 and half hours. Then started out again and noticed this time it had all the power and acceleration like it normally does but only to lose it again after I had to turn around, go back, this time only put it in park and keeping it running then back into drive and go and have slow acceleration and no power once more.

Its the 4.7L V-8. Auto trans and AWD/4WD.
My car has an automatic transmission.

A: Hello. This can be caused by a number of th...

Hello. This can be caused by a number of things. If the Check Engine Light is coming on then I would usually start by scanning the computer for codes. If there are codes then it may give me an idea of what is going on.

If not then I usually monitor the signals from the sensors to see if any are failing. If they are also fine then the catalytic converter needs to be checked for clogging and the fuel pressure must be checked as the pump may be failing causing low fuel pressure.

From what you are saying it sounds like the fuel pump may be going out. If you plan on having this looked at, consider the assistance from a certified mechanic who can come to your home or office to diagnose your loss of power.

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: Leaking coolant hoses

Hello, a leaking cooling system is something that needs to repaired sooner than later. If the vehicle overheats that can lead costly repairs or engine failure. You should get the aid of a mechanic who can pressurize the cooling system...

Q: How do I use the steering wheel to adjust the volume?

The steering wheel volume switches are located on the back of the steering wheel, on the right side. Using your right hand, feel behind the steering wheel for the volume switches. Press the top of the switch to increase the...

Q: It was revving up switching gears like it was stuck in neutral then it corrected itself, I made it home now it will not go into ge

Hi there. It sounds like you have a serious transmission failure going on. What you've described is the first sign of a transmission problem on this vehicle. To diagnose this, I'd typically start by removing the transmission pan and inspecting...

Related articles

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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
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.