Skip the auto shop - Our mechanics make house calls

Q: Bucking and sputtering upon startup on 1999 GMC K1500 Suburban

asked by on

My car has 180,000 miles. It developed some starting problems. It doesn't matter if I start it when the engine is cold or warmed up, it would start bucking and sputtering. This would last in the first several minutes upon startup. It would keep running like this and if I attempted to accelerate fast, the car would start revving high. After several minutes of running rough, it would get back to normal. Each startup is like this. What might be the cause of this problem?

Hello. Thanks for writing in about your 1999 GMC K1500 Suburban. It is likely a faulty/dirty idle air control valve, a faulty mass airflow sensor or bad coil pack causing your issue. If you would like to have this looked at, a certified professional from YourMechanic can come to your car’s location to inspect the starting issue and let you know what should be done.

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!

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: Truck speeds up to 60 to 40 miles an hour and then acts like its stuck in neutral.

Your truck should have the 460 E transmission, It is an electronically controlled 4 speed transmission. The fact that you don't have any transmission codes is not good news. If your problems were with the control system or the solenoids,...

Q: When engine warms up and goes in reverse, it shuts off

Hello there. This is a bit of a rare issue on the 1990 Chevrolet K2500. There are a few possible causes that come to mind with the issues going into reverse. The most common would be a shift solenoid, torque...

Q: How do I know if the fuel pump is bad?

Hi, thanks for writing in. You will need to check the fuel pressure on the fuel pressure port on the engine fuel rail. The pump should be producing at least 56 to 62 psi for SFI engine. If pressure is...

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...
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...
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...