Toyota Avensis Vibration on idling at traffic lights – Problem and Solution. This is quite common with the 1AZ–FE engines of Toyota. This engine is used mostly on Avensis and Camry as well as some Corolla and Rav4 models and the following engine types.
Vibration and stalling problem is mostly observed with the following petrol engine models of Toyota
- 1.6-litre VVT-i 3ZZ-FE 81 kW (109 hp) (110 bhp)
- 1.8-litre VVT-i 1ZZ-FE 95 kW (127 hp) (129 bhp)
- 2.0-litre VVT-i 1AZ-FSE 108 kW (145 hp) (147 bhp)
- 2.4-litre VVT-i 2AZ-FSE 120 kW (161 hp) (161 bhp)
Vibrations in your Toyota and What Causes Them?
If you keep your car engine turned on for a very long time, you might feel some vibrations. As the days go by and your car becomes older, you will notice bigger problems because of the wear and tear, mentioned problem mostly starts after the first 120.000km. / 70.000 miles.
Poor Fuel Quality
A major reason of vibrations in a vehicle is poor quality of fuel. Using poor quality fuel which has low levels of octane, because of a lack in octane, the engine tends to experience more load. If you go to a gas station that is famous for its quality, then you will realize that the sounds and vibrations in the car will reduce after filling your tank with good premium quality fuel. Meanwhile, poor quality fuel always leads to more fuel consumption and untimely engine breakdown.
Bad Engine Mounts
If the mounts in the engine wear out in years, then the whole frame of the engine will slightly displace. Broken mounts very often lead to excessive engine vibrations, especially felt more with the automatic cars.
Dirty MAF sensor
When the mass air flow sensor is not in good confition, the ECU will not be able to receive any correct information from it. This will lead the engine to run with rough idling whenever you stop or park the vehicle. Watch the dashboard to see if the RPM speed fluctuates it’s position rapidly . If this is the case, then you most probably have a defected MAF sensor to take care.
Clogged intake manifold
The dirt or debris has not cut off the flow of air or fuel, but limits the amount required to fully ignite the cylinder.
Why does it get clogged up? As part of the car’s exhaust emissions system, part of the dirty exhaust gases are usually returned back into the intake manifold to provide reduction at the temperatures of combustion chamber, as a result, diminishes the combustion temperature and as a consequence the harmful NOx gas that we all avoid breathing in. The worst part of this is, that some portion of the carbon, oil vapor, resins, residues which present in the exhaust gases form a coat in the intake manifold, forming as ‘carbon build-up’. In a longer period, this builds carbon up to a point that you would be quite shocked about “how the engine is actually able to breath and run!”
All of the issues we are listing hereabove have a common symptomatic with another major issue which is the poor performance and hesitation at acceleration. This is the case with most of the 1AZ-FE / FSE engines when the dashboard shows kilometres higher than 150.000km./ 90.000miles
After spending some time on the research combined also by the self experience, we have collected together the 100% working solutions and remedies for the most of the cases and published in another article on the page about the “Toyota AZ Engines hesitation and acceleration problem and recommended/working solution”
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Methods: SEAFOAM cleaning (in the fuel tank and on the top end), carbon cleaning, engine flush, oil change, cleaning of O2 sensors (diagnostic device should tell if needs to be changed), Spark plugs cleaning (to be changed if the damage is at unrecoverable level with cleaning) Check the solution page.