Skip the auto shop - Our mechanics make house calls

Q: Horrible acceleration, horrible fuel mileage, and misfire codes.

asked by on

When you give it gas the truck is slow to accelerate and often idles unsteady. fuel mileage is horrible 7-8 to the gallon.

My car has 155555 miles.
My car has an automatic transmission.

A: Hello. First task is to extract any problem...

Hello. First task is to extract any problem codes, whether the Check Engine is set or not. There are many things that can cause the symptoms you describe: injectors stuck open, or fuel pressure too high, coolant temperature sensor malfunctioning (telling engine management engine is colder than it is), the engine running too cold, etc. To have this issue taken care of, I recommend having a certified technician diagnose the cause of the codes so that these issues can be resolved.

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: the check engine light appears and it gives us the code P0170

The P0170 trouble code does not necessarily go with your vehicle, but it indicates fuel control problems. I recommend the following: Have the fuel pressure tested to see if it is too low or high. Make sure...

Q: I want to replace the cluster panel. Now does the mileage be stored in cluster panel or in computer. I am getting a used panel.

Hi there. Remove the dash panel cover and take out the gauge cluster. Check to see if the odometer is electronic and see if there is a little cover. If there is a cover to the case, then remove the...

Q: Vehicles Check Engine light blinks and then stays on, runs rough like on 6 cylinders/misfiring when wet.

Hi there. Check the spark plugs and see if they are sparking. Get a code reader and check for any codes that could be stored in the computer as the check engine light is on. The code will give you...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.