Skip the auto shop - Our mechanics make house calls

Q: Surging/bucking/wavering when accelerating between 2000 and 3000 RPM

asked by on

I own a 2002 Toyota Camry LE V6 with 158000 miles. Lately it's been having a bucking/surging problem when I accelerate between 2000 and 3000 RPM. It did the same thing about 3 years ago due to a faulty oxygen sensor. I replaced it and the car has ran great since, but now it's doing it again. According to my scan tool, all oxygen sensors seem to be functioning normally. Though last week there was a P1410 code for an EGR circuit malfunction that went away the same day. I had replaced it today, since it did look in pretty bad shape, and cleaned the throttle body entirely, plus made sure all wiring and their connections weren't broken or loose. It ran OK for about half a mile and starting bucking again upon acceleration. There are still currently no codes. Problem started with no warning about a month ago.

My car has 158000 miles.
My car has an automatic transmission.

Try and road test the vehicle with the EGR valve vacuum line disconnected and plugged. Your check engine light may come on for the valve being disconnected but you are just testing for now. If the problem goes away then you know the EGR system is causing a lean condition in the engine causing the surge. Try and clean out the EGR passages and the EGR temp sensor of carbon. Try de-carbonize the intake and throttle body then clean the injectors. This should fix the problem. If you want a qualified technician to diagnose the problem, then you can contact one through YourMechanic to do this at your home or work.

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
  • Surging/bucking/wavering when accelerating between 2000 and 3000 RPM

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 not starting with good cranky sound

Hello. This may be caused by a variety of issues, of which one may potentially be the fuel pump fuse. This may also be caused by a fuel pump connectivity issue or relay. If you are mechanically able to perform...

Q: Radiator leaking from crack in top

This is pretty common. The metal gets very thin from cooling system wear, and the tank cannot hold the pressure any more and splits. I recommend replacing the radiator and testing the complete system for any other problems.

Q: My 2002 Ford Crown Victoria is acting like it want to go, even though I'm not pressing on the gas

Hello. The most common cause of the high engine idle accompanied with a delayed acceleration will be a vacuum leak in most cases. This engine gets vacuum leaks on the vacuum connection on the intake manifold for the PCV hose....

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.