2014 Mazda 3

**travajante** · December 20th, 2018 10:50 AM

Originally Posted by sparcom2

Is the m3 from abroad?

Local....abused on daily traffic, enjoyed on spirited runs w/ occasional track time.[emoji4]

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**jojopad** · December 20th, 2018 11:01 AM

Originally Posted by sparcom2

My AC temp is always set to 25deg, m3 has really cold AC. I lived in the province, traffic here is moderate and I drive my m3 hard once a day to keep away or lessen the carbon buildup. I ordered the sparkplugs now in the US, its way cheaper compared to the dealer. Will change my sparkplugs after new year.

Given your driving conditions, there shouldn't be any indications of early knocking symptoms with your M3's engine. Fuel quality is typically a suspect with this type of issue. I also read somewhere that excessive cleaning agents added in fuel can also cause abnormal combustion. Are you using Shell FuelSave?

Incorrect calculation of ignition timing can also cause knocking. Some sensors in the engine maybe malfunctioning on certain occasions, erratic.

**sparcom2** · December 20th, 2018 11:09 AM

Originally Posted by jojopad

Given your driving conditions, there shouldn't be any indications of early knocking symptoms with your M3's engine. Fuel quality is typically a suspect with this type of issue. I also read somewhere that excessive cleaning agents added in fuel can also cause abnormal combustion. Are you using Shell FuelSave?

Incorrect calculation of ignition timing can also cause knocking. Some sensors in the engine maybe malfunctioning on certain occasions, erratic.

I only use shell fuel save gasoline from day one and the station is owned by shell. Throttle and sparkplugs cleaning done. The throttle response is way better now howevere my trusted mechanic advice me to have my car scanned so the sensors will reboot. My rpm still drops during idle when put to drive (complete stop and AC off). The idle is normal if the AC is on.

**travajante** · December 20th, 2018 11:13 AM

If one wants to see what all the sensors are getting/feeding, how the engine is reacting to everything, how the variable timing is compensating.....all these can be seen thru OVT data logging. Mazda IDS/ESI can see these, too. The tech just has to be thorough & detailed.

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**RedlineJunkie** · December 20th, 2018 11:15 AM

Originally Posted by sparcom2

I only use shell fuel save gasoline from day one and the station is owned by shell. Throttle and sparkplugs cleaning done. The throttle response is way better now howevere my trusted mechanic advice me to have my car scanned so the sensors will reboot. My rpm still drops during idle when put to drive (complete stop and AC off). The idle is normal if the AC is on.

I'm also nearing 30k on the odo and for 40k pms this month. I might as swell have my sparkplugs and throttle body cleaned. Do the dealership offer that service?

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**travajante** · December 20th, 2018 11:16 AM

Originally Posted by sparcom2

I only use shell fuel save gasoline from day one and the station is owned by shell. Throttle and sparkplugs cleaning done. The throttle response is way better now howevere my trusted mechanic advice me to have my car scanned so the sensors will reboot. My rpm still drops during idle when put to drive (complete stop and AC off). The idle is normal if the AC is on.

I think the rpm reaction to load is within range w/ AC off if doesn't drop sub500. That's the least of your worries. The pinging should be sorted.

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**sparcom2** · December 20th, 2018 11:33 AM

Originally Posted by RedlineJunkie

I'm also nearing 30k on the odo and for 40k pms this month. I might as swell have my sparkplugs and throttle body cleaned. Do the dealership offer that service?

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They do offer it however you need to pay extra. If you want it free you have to make it appear that you’re having problem with your car and requires cleaning of the said parts (warranty claim).

**sparcom2** · December 20th, 2018 11:35 AM

Originally Posted by travajante

If one wants to see what all the sensors are getting/feeding, how the engine is reacting to everything, how the variable timing is compensating.....all these can be seen thru OVT data logging. Mazda IDS/ESI can see these, too. The tech just has to be thorough & detailed.

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How much does the dealer charge for this?