Q: Truck running rough over 55 MPH.

asked by on January 14, 2016

I have over 140,000 miles on my truck. The Engine light is on and it starts running rough when driving over 55 MPH. I have never had a tune-up performed on it.

Check Engine Light is on Inspection $79.99 - $99.99 Get a Quote
Spark Plugs Replacement $98.11 - $669.97 Get a Quote
Fuel Filter Replacement $82.95 - $292.56 Get a Quote

I would have a technician come scan the codes on the computer and perform a tune up as well. Your spark plugs are recommended to be replaced at 30,000 miles. I would also replace your fuel filter as well. They have been known to clog up damaging the fuel pump and restricting flow to the injectors.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $65/hr

What others are asking

Iod Fuse / Check Engine Light

Your first order of business is to extract the problem codes which are driving the Check Engine light. Hesitation to start when cranking - if this is what you mean - could be a sign of a weak power supply...

Having issue with HVAC system in my car

This symptom can actually be caused by two different things. You are right to think that the blend door actuator could be at fault. If the blend door is not able to move, this will not allow air passing over...

I have dry rot on all 4 tires on my 2007 Toyota Corolla. I bought the car several months ago and dealership said they would replac

Hello, thank you for writing in. Having the two front tires is typically priority for a couple of reasons. One being the front tires support the engine and transmission, meaning they hold a majority of the weight. The vehicle is...

2001 Ford Focus Won't start

Hi there. The fuel pump is in the fuel tank. You will have a fuel test port on the engine fuel rail. You should have fuel pressure when you cycle the key to on for a few seconds and during...

Can I drive my car even the brake and abs light on or not?

Hi, thanks for writing in. It is not recommended to drive the vehicle until you have the brake system diagnosed to find out the problem. If the ABS has a bad sensor then this disables the ABS system but the...

My car is shaking - 2000 Ford Mustang

If the shaking is occurring with the car stationary, that would not involve the wheels or driveshaft, although it could implicate the torque converter. A shaking engine diagnostic would start with the motor mounts. If those are judged solid (there...

I think the anti-lock security on my car is active and it doesn't start.

Hi there. Look at the anti-theft system on the vehicle and see if the light is flashing. If the light is flashing, then remove the battery cables and leave them off for 13 minutes. While the cables are off, put...

Doesn't turn on without the Check Engine Light coming on

Hi there. It sounds like the EFI relay is sticking or has resistance internally. This relay provides power to the engine computer. If it delays that power, then there is a delay in the Check Engine Light displaying and the...

How do I turn on the cooled seats?

There are Cooled Seats in your truck. These Cooled Seats are useful when driving in hot weather. To turn on the Cooled Seats. Press the Cooled Seat button for the driver. Press the Cooled Seat button for the passenger...

Related articles

How to Figure Out How Much it Costs to Have a Car
One One of the largest expenses you have is your transportation. It’s how you get from home to work, school, the grocery store, or the movie theater, and it costs you money. Have you ever figured out how much exactly...
How to Check the 5 Essential Fluids in Your Car
Checking your oil and adding engine coolant, brake fluid, power steering fluid, and windshield washer fluid are essential for maintaining your car.
P0529 OBD-II Trouble Code: Fan Speed Sensor Circuit Intermittent
P0529 means the cooling fan sent an incorrect voltage signal, caused by open/shorted/corroded wiring, or a damaged fan motor/relay/speed sensor.