Skip the auto shop - Our mechanics make house calls

Q: Truck has little power accelerating and has a slight shake at idle

asked by on

I have replaced the spark plugs twice, the coil packs, the map sensor, the fuel pump, and the air filter. The loss of power and the shake started when I had a misfire. So I changed the above it no longer misfires. But still has little power.

My car has 227000 miles.
My car has an automatic transmission.

A: It is possible that you could be having and...

It is possible that you could be having and issue with your fuel injectors. The fuel delivery may be an issue here. I would recommend having a qualified professional use a high tech scan tool to determine if your fuel injectors are functioning properly. If the fuel injectors are malfunctioning, I would recommend having all affected cylinders replaced with new OEM quality fuel injectors. I would also recommend having a three part fuel system cleaning performed as well to clean out the intake manifold of any carbon deposits on the bottom of the valves that may have built up over time.

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: Is there a way to find what past work has been done on my used vehicle?

Hi, thanks for writing in. There is not really a way to tell when and if the spark plugs were changed. A good mechanic, however will be able to remove them without breaking them and tell you whether or not...

Q: Automatic transaxle light and check engine light are on.

Hi there. Check the transmission fluid level and color. The fluid should be full when the engine is running at either cold or hot conditions. Plus the fluid should be red in color. If the fluid is dark red in...

Q: Random misfiring. Check engine light is on. Running real rough. Bad PCM?

Hi, thanks for writing in. There are several malfunctions that can cause a rough running condition. The spark plugs could be an issue, but it could also be a problem with the ignition, a fuel supply problem, or even a...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...
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.