Skip the auto shop - Our mechanics make house calls

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 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
  • Home
  • Questions
  • 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: Loss of power won't go over 35 mph - 1999 Dodge Ram 1500

This may be a sign of low fuel pressure, a failing mass air flow sensor or potentially a clogged catalytic converter. As you may already know, the catalytic converter converts toxic exhaust gases into less harmful pollutants that are suitable...

Q: Engine cranks but won't start 2005 Ram 1500

Did the Check Engine Light illuminate? If so, a fault code may shed some light on the situation. Check your service history to be sure the maintenance is up to date, as spark plugs are recommended every 30,000 miles and...

Q: Car won't start, battery drain - 1979 Mercedes-Benz 450SL

Hello. The Chilton manual will be able to give you accurate information as to the location of the voltage regulator. This manual can tell you whether your voltage regulator is an internal or external part. It is not recommended that...

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...
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...