Q: Gas stops flowing above 25 mph & can't accelerate

asked by on

My car will start properly, but once driving it won’t go more than 25 mph. Once it reaches 20-25 mph, the gas will stop flowing and I can't accelerate until it goes back below 20 mph. I thought the problem might be the fuel filter, so I replaced it, but that was not the solution. Can you help me by giving a diagnosis and what will solve this?

There are several possibilities that can cause an engine to fall on its face when it hits certain RPM ranges. It could be a fuel delivery issue, air issue, or an input sensor such as a crankshaft sensor or mass airflow sensor setting injection timing incorrectly.

Fault codes need to be read out first to see what obvious issues might be present and those items corrected. Vacuum leaks and unmetered air leaks need to be sought out as this can cause lean misfiring and issues on acceleration.

Crankshaft sensor signal needs to be looked at as well, if the signal is not clean, it will cause issues at higher RPM’s and cause ignition and injection to cease. You may want to enlist the help of a mechanic, such as one from YourMechanic, who will have the equipment and expertise to diagnose and correct this acceleration concern.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Gas stops flowing above 25 mph & can't accelerate

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: I got code p0229

A P0229 is a fault in the throttle position sensor: the sensor that tells the computer how far you are stepping on the accelerator. On the Passat, it is part of the throttle body. The Throttle body has redundant sensors...

Q: Vibration above 60 MPH.

Hello, a bad vibration should be handled sooner than later since it can cause handling issues and wear on components. I would start by lifting the front of the vehicle with a jack and put it on frame stands. Spin...

Q: 2005 ford mustang GT wont fill up past the halfway mark

Hello. We will be happy to assist you. Anything built before 4/27/05 may develop problems with the fuel tank and a replacement is suggested. The issue with those tanks are that they won't fill up all the way because the...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...