Q: My car reduced speed and increase at the same time even on the motion

asked by on October 13, 2016

My car works very slow even when am on speed it reduce and increase at the same time pls what will I do because the price of the pump injection of toyota avensis verso is very expensive pls

Hi and thanks for your question. With your engine becomes jerky at highway speeds and is trying to climb up in speed but slow down at the same time, then you will need to check the EGR (Engine Gas Recirculation on the engine. The EGR takes old gasses that are burnt and puts them into the engine to reduce pinging and extra heat on heavy acceleration. The EGR can be plugged up and needs attention. I recommend removing the EGR valve and cleaning it. Then put it back on and retest your vehicle. If you have the same problem, then the EGR valve is stuck and needs replaced. I recommend seeking out a professional to diagnose the loss of power and guide with repairs.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

Recently my car started to hesitate when I accelerate from a complete stop.

Hello. There are several problems which could affect poor idle and low speed running. Starting with the misfire indicated by Check Engine codes, bad spark plug coils, especially with your mileage. Check also for oil leaking from the valve cover...

Act like it runs out of gas but it doesn't

It sounds like you're having a fuel pressure issue. If you have a fuel pressure gauge, connect it to the shrader valve on the fuel line under hood and check the readings. It should be over 10psi if it has...

Car hesitating and shaking.

A lot of things could cause the problems you are having from a vacuum leak to a idle air control valve. My best advice is have your vehicle diagnosed firsthand but a trained professional, such as one from YourMechanic.

Related articles

How to Flush a Fuel Injector
Clean fuel injectors help keep your engine running smoothly and efficiently. Clogged fuel injectors result in reduced fuel economy and loss of power.
How to Diagnose a No-Spark or Loss of Power Condition on a Modern Car
Misfires caused by a loss of power condition on a car can be tricky to diagnose, but are necessary to fix to avoid further damage and costly repairs.
Symptoms of a Bad or Failing Air Charge Temperature Sensor
Common signs include a lack of power when accelerating, trouble when starting in cold weather, and a decrease in fuel efficiency.