Car has slight hesitation when taking off sometimes. Also when coming to stop then reaccelerating before completestop. Reminds me of the old carburetor when the accelerator pump in the carb wore out. Took to dealer they couldnt find anything wrong. Its getting annoying
I have a 2021 CX-5. I also have a 1996 F150 it still runs perfect. This is my first Mazda may be my last.

 

You could try a strong injector cleaner. Sometimes my truck feel a
little "fuzzy", a dose of injector cleaner clears it up.
I use 'Seafoam' but there are other strong cleaners available.

My 2¢

 

Preventative care and maintenance does not mean that a platform and model in that platform is defective..... FORDS have there fair share of issues as does almost very vehicle. Lets not forget Ford transmission issues on Explorers that gave them the nickname Exploder and the old term FORD=Fix And Repair Dailey.

Reading your condition really indicates a dirty MAS/MAP/ IAT sensors? Cleaners introduced in the fuel will help with cleaning the fuel injectors along with using better top tier fuels and naturally you should as long as you are going to clean the sensors to clean the Throttle body.

USE THE CORRECT CLEANERS FOR ALL THE COMPONET OR DAMGE CAN OCCUR.

I recommend CRC products

 

Check your air filter and see if its clean , put 1 bottle of Chevron Techron Concentrate Plus and 1 can of Seafoam in a full tank of top quality fuel and drive it like you stole it on the highway for a couple hundred miles . If that doesn't work check and see if the Throtlebody isn't all carboned up. If it is use CRC Throttle Body and Air-Intake Cleaner . If you have over 60000 miles on it ,check the spark plugs. If none of that works bite the bullet and bring it into a Mazda dealer .FYI change the oil and filter after a tank full using the Techron and Seafoam , it dilutes the oil and needs to be changed

 

Chief good suggestion but I should point out you don't really want to drive, run the engine hard it if there may be injector problems with an ECU controlled fueling system. If the injector pintle hesitates or sticks this could badly lean the fuel mixture at or close to WOT and high engine speeds and we know what that will do. Good for pre 1995 vehicles not so good with anything OBDII and CAN-bus.
Spark plugs are always on my list but here again reading EXACTLY what the OP described sensors is a very common problem that we service almost daily in the shop with customers vehicles we service which having dirty sensors and Throttle body. No codes also is a indicator of slightly dirty sensors not so much fueling from injectors or spark plugs which would usually have a DTC. The other thing until all things are looked at you don't really want to assume anything and do not perform the Italian-Tune-up either.

ASE

 

Be careful to use EXACTLY the correct cleaners in and around sensors.
I also recommend CRC products.


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Mazda3 Things I like to do - Page 37 - Mazda Forum - Mazda Enthusiast Forums


ASE

 

If he checks the plugs first ,he can see if one of the cylinders is running lean my the looks/color of the plug. Also it may very will be the cylinder deactivation ( if his year has it ) could be acting up. Most of the time a check engine light /MIL will come on if an injector is that bad on late model OBD II vehicles . He more than likely has dirty injectors from using low grade fuel. You would be surprised how many people try to save a few pennies and use cheap low grade fuel with the price of fuel now a days . These are the Lets go Brandon fuel prices. It might be time to try another gas station if he has only been using one ,and see if that doesn't work .He could be getting some bad fuel .

 

If the OP’s issue is truly intermittent, then it is doubtful it is being caused by a dirty air filter element, worn plugs/injectors or a dirty TB. These will usually create a more constant issue. Which engine is in his 2021 CX-5? This is his second post complaining about his CX-5, perhaps he really would be happier with another 20th century vehicle like his trouble-free 26 year-old Ford.

 

You can not really read spark plugs properly by just pulling them and using those old charts that are out dated and even decades ago not the true value of what is going on accept extreme combustion conditions! But they were good for generalities and unfortunately are still used as absolution to what a spark plug should look like! SAD!! As soon as the engine speeds reduces down from changing the throttle position or idles even for a few seconds it changes the appearance of a spark plug. Using an oscilloscope clearly indicates even in the 70's that reading spark plugs accurately must be done under the load of the engine and not when it idles. The proper way to read spark plugs is by running the engine up to the speed yuo are checking for proper igniting of the air and fuel and without changing the throttle position to turn off the engine safely leave the road and pull the spark plug. Then using a flashlight and magnifying lens examine the spark plug. Cylinder deactivation shuts the fuel to the cylinder so they require an even different approach to properly reading spark plugs. A sticking pintle in an inject actually rarely will pop a DTC.

Keep in mind that DTC are not always look for if the engine check light does not appear. If the ECU does not register an ongoing issue that repeats it may not indicate the engine check light. There may but not alway be a stored DTC and the monitors may be in fault. Or there may not be anything at all which may indicate anomalies condition outside the programing of the ECU and that's why you need a professional Scan tool to start looking for the issue and not reley on the ECU reporting the problem(s).

ASE


Or perhaps a combination of them or all of them... ?????
But I do like the last part of your response...

I always love how so many "think" there vehicle's are in perfect running condition? Look at my personal thread and what it takes to consider making a statement like that. Even I get "burned out" at times on my FAMILY DAILEY DRIVER keeping it somewhat close but would never say "PERFECT RUNNING CONDITION"..

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The car has been doing this since it was new. I brought it to their attention. They say They can't find anything wrong. So i guess I will live with it ot trade it in. It just kills me - you buy a new car today and there is always something wrong. Car only has 18k