Skip the auto shop - Our mechanics make house calls

Q: What causes the engine to run rough and the engine to die when the accelerator is pressed?

asked by on

Okay I have a 1999 Chevrolet Silverado it's a LS Edition with a 5.3 leader V8 and when I start the engine it runs extremely in a low idle and it wants to die and when I hit the accelerator it does not do anything but hesitate I just wanted to know if you could help me out on diagnosing this further down to where I need to be I replace the crank position sensor and I replace the throttle position sensor the mass airflow sensor the fuel pressure regulator cleaned the injectors replaced the fuel filter and fuel pump and I still can't get it running can you please help me thank you

My car has 183430 miles.
My car has an automatic transmission.

Hello. You have covered most of the common parts that fail with the exception of the idle air control valve/module. This is a unit that works similarly to the mass air flow sensor as it regulates the air intake into the throttle body at idle or low speeds as it is mixed with fuel prior to being injected into the motor. When this is not working properly, this can cause the motor to starve or be flooded with too much fuel depending on its condition. I would recommend having an expert from YourMechanic come to your home to diagnose the rough idle and replace the idle control valve if necessary.

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!
  • Home
  • Questions
  • What causes the engine to run rough and the engine to die when the accelerator is pressed?

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: What other issues could I check, if I changed my coolant temperature sensor and my vehicle is still jumping or missing?

You need to fix that air leak. The best thing to do is buy a new intake boot. If you're short on funds, you can use duct tape or some other strong tape to cover the hole in lieu of...

Q: SUV would not accelerate and all warning lights came on - 2009 Kia Borrego

A failure of the electrical system can come from a loose or broken connection at the battery or an alternator failing to maintain the charge. You may want to hire a second source for another opinion and maybe another estimate...

Q: Where is my pvc valvle located and how do I take it off and how hard will this process be?

The positive crankcase ventilation valve (PCV) is located in the valve cover, on the rear bank of cylinders. There is a tube that runs from the intake plenum to the valve, and is approximately 1/2 inch in diameter, that carries...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.