Q: Car will start and idle but when I give it gas it struggles and almost dies out.

asked by on

We have checked all the fuel lines and vacuum lines they are all clear and not leaking. The timing is right. Everything under the hood but the actual valves, lifters, etc under the valve cover is new. Including fuel pump, filter, water pump, injectors, fuel regulator, distributor cap, spark plug, wires, throttle body, EGR, etc. Pretty much replaced everything chasing the problem down. Catalytic converter is not the problem. Its a California model. It will idle all day long until you push the pedal down more than 300rpm. Thats when it stumbles and almost dies. It has a bit of popping sometimes and almost sounds like its gonna backfire but never does. Anyone have any advice? Im at my wits end on this car.

My car has 245000 miles.
My car has an automatic transmission.

Hello. This can be caused by a number of things. Though most of the time it is caused by a bad air flow sensor. When this sensor does not read correctly this will occur.

I usually install a scan tool and check the readings of the sensors. This will tell me what is going on. If you need help with these checks, consider getting some help from a certified mechanic, we can come to your home or office to diagnose your cars driving symptoms. Once this is done, the issue will be evident and an accurate repair can then be made to get your car running smoothly again.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. Car will start and idle but when I give it gas it struggles and almost dies out.

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: Car takes off without pressing gas pedal

Hi there. With the exception of the oil change light, all of these issues would require closer inspection in order to determine the exact cause. A high idle and movement without pressing the gas can be caused by many problems,...

Q: I have a 1992 Honda Accord EX and I'm having an issue with the car not having power to the dash at all and doesn't start.

Hi there: The symptoms you're describing are often an indicator that a problem exists with the alternator or charging system such as an electrical relay. Before you spend another penny trying to chase the symptoms by purchasing more parts, it's...

Q: Ticking noise from engine after running with low oil from leaking oil pan.

Depending on the ticking noise will depending on if it is a camshaft follower or a camshaft noise. If your engine was ran without oil you may have low oil pressure at idle and the engine can get noisy if...

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 Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...