Q: Intermittent loss of acceleration

asked by on March 03, 2017

This has occured typically afyer driving the car on the hwy or interstate for 30 to 45 minutes. Sometimes just 15 but never happens in town. Ill be holding the gas pedal in going fairly steady, the car starts deceease speed and loose acceleration it will then die and ill pull over, or ill pull over come to a stop then the car will die. Car cranks right back up sometimes it will act this way trying to go farther down the road sometimes it wont do it again for a week or so. I took it to mevanic shop, they had a hard time getting it to act out. Spark plugs changed new fuel pump and hoses. The shop says car isnt throwing any codes and they have expensive equipment that wouldntell them if it was a bad sensor. Any ideas on what it could be?

My car has 121000 miles.
My car has an automatic transmission.

Fuel Pump Replacement $120.92 - $1189.43 Get a Quote
Fuel Injector Replacement $379.42 - $3631.88 Get a Quote
Fuel Pressure Regulator Replacement $111.64 - $903.72 Get a Quote

It sounds like you may have a fuel supply problem in getting the proper amount of fuel to the fuel injectors which is typically caused by a bad fuel pump or potentially faulty fuel injectors. This can happen when the pump itself is not working properly or when the fuel pressure regulator is not maintaining the proper fuel pressure in the fuel system causing the engine to starve for fuel. Since you have just replaced the fuel pump, I would look to the fuel injectors to see if they may be causing the problem. This can also happen when there is insufficient connectivity to the fuel injectors which can cause an intermittent fuel spray pattern into the intake system resulting in a lean fuel condition or the motor otherwise starving for fuel. I would recommend having an expert from YourMechanic come to your location to diagnose your fuel system.

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

What others are asking

I have an issue with my Honda City 2004 AC

The problem sounds like you may be having an A/C clutch cycling out due to being low on refrigerant. Another possibility is that the system is overcharged and is putting a large load on the engine, and then kicks out...

Why is my car not accelerating Normal

The metallic noise could arise from a variety of sources; anything from the brakes to the engine. The origin could definitely be pinpointed by a certified mechanic during a vehicle noise diagnostic. Slow acceleration has a variety of causes. Fuel...

I need to know what's the rattling noise the engine makes when I turn on the car

I would have to hear the noise to know exactly what the noise is since I have seen a serpentine belt tensioner make a knocking noise on these engines and it is an inexpensive repair to just replace the tensioner...

Car is difficult to start and keep running after adding fuel.

Your car has a small purge valve that controls the venting of fumes from the fuel tank as these fumes build up inside, particularly when you are refueling the car with gas. The EVAP system prevents fuel vapors from the...

Engine oil pressure warning light on

The engine oil pressure light is the to warn the driver when there is not enough oil pressure. This light usually comes on when the oil is far below the needed pressure to properly lubricate the engine. The oil level...

My service engine soon light is on. I hear like a rattling noise when engine is running sometimes. The power doesn't feel the same

If you are referring to the check engine light on your vehicle occasionally the cause of it illuminating is the gas cap is loose. If the rubber seal on the gas cap is intact and the cap is tight, all...

Truck does not start

Hi. If the engine cranks normally but doesn't start, most likely the engine is not getting fuel or spark. Just because you have fuel pressure from the pump doesn't mean that fuel is getting to the engine. In modern vehicle,...

How to disable alarm on a 97 acura rl

If you have a factory installed alarm system then you cannot disable it. If you have an aftermarket installed alarm system then it can be removed and connections cut restored to original configuration .

Want to swap an engine.

The engine will fit, but the engine in the 2002 does not have the Variable Valve Timing System. You will need to swap the cylinder heads over to the other engine to make the VVT system function in your vehicle....

Related articles

A Buyer's Guide to the 2012 Kia Sedona
The The Kia Sedona has been increasing in popularity over the years and the 2012 model kept the streak alive. This minivan can be yours at a very reasonable price, yet you don’t have to worry that this will mean...
2012 Kia Optima vs. 2012 Nissan Altima: Which One Should I Buy?
Mid-size sedans can be pretty basic, with four doors and simple and straightforward options, decent but not stellar gas mileage, and an uninspired interior. They can also have great design and fight off boredom through sporty suspension and exciting technology...
The Best Used Cars to Buy If You’re Shorter Than Average
Vertically Vertically challenged? Hate getting behind the wheel and having to crane your neck to see? There’s nothing wrong with you, but there is something wrong with your car. It might be time to trade it in and take advantage...