Q: My truck is starting but won't stay running, it's was running fine just a couple days ago.

asked by on

I noticed that there is fuel dripping out of the tail pipe. However when I start I can keep it running as long as I hope the gas down a bit, but as soon as I let off it dies. Battery is charged, it has gas and it's a rebuilt moder like I said it was fine just a couple days ago. Any suggestions of what I should check or look at to solve the problem?

My car has 100000 miles.
My car has an automatic transmission.

It sounds like you may possibly have a stuck EGR valve. The EGR valve allows the flow of exhaust gases into the intake manifold in controlled amounts. When you start the motor, the valve remains in a closed position, blocking the flow of exhaust gases. Once the engine reaches operating temperature and speed increases, the valve, either through vacuum or electronic control will gradually open, allowing burned exhaust gases to enter and combine with the air-fuel mixture inside the combustion chamber. When the EGR valve is clogged or dirty, as they are prone to, it may not function properly causing the engine to idle rough, stall at idle speeds, cause the car to get poor fuel mileage, or emit a strong smell of fuel due to excess hydrocarbons which also results in failing emissions tests. I would suggest having an expert from YourMechanic come to your location to diagnose and inspect your vehicle.

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. My truck is starting but won't stay running, it's was running fine just a couple days ago.

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: Brake exhaust doesn't shut off when I press on the accelerator.

Hello and thanks for your question. When you press the accelerator to deactivate the jake brake system, the electronic throttle sends a signal to the computer to shut off the power to the jake brakes for acceleration. The switch...

Q: Gen light

You will need to check to make sure the two red wires to the alternator have power. Afterwards, follow the wires down to make sure they make contact to the starter terminal that goes to the battery. Follow the brown...

Q: Electric door unlocks but does not lock. I have to manually lock all doors. 2007 Dodge Magnum

Hello - the first level of diagnosis is to isolate which component does not lock the doors as expected: master door lock switch on the driver door, the lock button on the key fob, etc. If only one of these...

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...
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...
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.