Sometimes when you are cruising in your car and need to accelerate either slightly or harder it is quite common to experience an annoying stalling or hesitation which makes car run slower. No matter if your engine is with powerful parameters or not when some parts in your car are defected or needs a mechanic’s touch you will usually keep experiencing it until it is fixed by an expert.
Toyota Avensis engine hesitation and sluggish performance
There might be various reasons causing this annoying situation with the car, however, in the most of the cases this hesitation issue is caused by something that you can identify and fix alone– Dirty MAF sensor can be one of the most common reasons! Starting the checklist with the MAF sensor cleaning.
Assuming that you have no problem with check engine light however, this may still be playing a serious role with the performance of your car. You will need to buy a MAF sensor cleaner, it contains a special compound which cleans the dirt from the MAF sensor wire and used only for this purpose, there are various products in the market and can be bought at a price range about 4-20$. CRC is one of the most popular brands which provides quite satisfactory results!
Where is the MAF sensor located in Toyota cars?
In the most of Toyota AZ petrol engines, MAF sensor position is easily accessible, you can find it just after the air box. The location of MAF sensor allows it to measure the amount of intake air going into the engine.
Do I need to remove the MAF sensor before cleaning?:
Yes, you should remove the MAF sensor from its place loosening the 2 screws. In most of the Toyota AZ engines it easily removable.
Toyota engine hesitation and performance problems
After unscrewing the 2 screws, gently remove the MAF sensor out from the air duct and carefully disconnect the connector socket.
When you are ready with your MAF sensor cleaner, spray 5 to 10times into the mass air sensor, onto the plate or wire. No Matter what brand or model of your car is, you should not scrub the parts inside; if you do, the chances are very high that you may break the very thin wire or deform the plate. After the spraying part, just let the Mass air flow sensor to dry completely before reinstalling it in the air duct.
- Do not touch the wire and the plate with anything, spraying the cleaner will do the job!
- When you are putting the MAF sensor back, place it carefully and ensure that there is no any air leak from the small gasket area in the body.
- Let the MAF sensor completely dry for at least 10 minutes.
- Do not use a compressor or air pressure on the wire and the plate.
- In some cases the screws easily become stripped or the screw hole gets worn, if that’s the case you should use bigger screws to ensure that it sits the position tightly.
When you complete all the steps you are good for a ride to test it now. In some cases, resetting the ECU will bring you much better results in a longer time. Your car’s ECU will be learning the parameters again this time with a fully working MAF sensor which provide accurate readings for air quality and the temperatures.
This fix and solution is basically recommended for all Toyota engines as well as all other brands.
Some of the other common symptoms of a dirty MAF sensor.
- Difficult to start the engine or having trouble turning it over.
- It stalls just after ignition.
- Hesitates or drags when under load or idle.
- Jerks and hesitates during quick acceleration.
- The engine displays abnormal values for rich or lean idling (especially when it is cold).
After cleaning the MAF sensor, if you still experience performance issues please proceed with the Toyota engine hesitation and performance problems – Checklist Part 2.