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Thread: Vibration at idle, gone with spark plug change

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    Vibration at idle, gone with spark plug change

    Hey all,

    Wanted to share my spark plug change experience. 2013 CX-5 Sport has 58k miles, 6 years old now. Only owner.

    Noticed after switching between my CX-5 and my Odyssey that my CX5 vibrates a bit when idling. Nothing concerning, Iíd describe it as an annoyingly perceptible vibration that my newer Odyssey doesnít have. I think it comes on so slowly over time that you donít realize until you drive another car for a while.

    I was initially worried that perhaps the intake valves had carbon buildup and needed cleaning but I really donít think thatís an issue with these cars (especially with my highway commute). Found another thread that kind of hinted at a vibration at idle that I thought I had. They did some stuff along with changing the spark plugs and they reported their idle smoothed out.

    I can report my slight vibration at idle is now gone. All I did was change my stock spark plugs with the equivalent Danko Iridium Plugs. Smooth idle now to where I can feel a difference when the AC compressor is running or not (like I did when new).Vibration idle was just large enough to mask the two different feelings through the wheel and my seat.

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    Arrow Vibration at idle, gone with spark plug change

    Quote Originally Posted by ruthrj View Post
    Hey all,

    Wanted to share my spark plug change experience. 2013 CX-5 Sport has 58k miles, 6 years old now. Only owner.

    Noticed after switching between my CX-5 and my Odyssey that my CX5 vibrates a bit when idling. Nothing concerning, Iíd describe it as an annoyingly perceptible vibration that my newer Odyssey doesnít have. I think it comes on so slowly over time that you donít realize until you drive another car for a while.

    I was initially worried that perhaps the intake valves had carbon buildup and needed cleaning but I really donít think thatís an issue with these cars (especially with my highway commute). Found another thread that kind of hinted at a vibration at idle that I thought I had. They did some stuff along with changing the spark plugs and they reported their idle smoothed out.

    I can report my slight vibration at idle is now gone. All I did was change my stock spark plugs with the equivalent Danko Iridium Plugs. Smooth idle now to where I can feel a difference when the AC compressor is running or not (like I did when new).Vibration idle was just large enough to mask the two different feelings through the wheel and my seat.
    Did you mean Denso Iridium spark plugs? What kind of factory plugs do you have? I personally would go for NGK plugs although the price on equivalent Denso plugs for SkyActiv-G is much lower.

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    Yes, Denso. Stupid autocorrect on my phone lol. Danko isn*t even a word is it?

    No NGK plugs in stock locally, and you*re right about the price. At 2x the price I can*t imagine NGK lasting 2x longer than the Denso plugs. No performance difference noticed between the old stock plugs and the Denso plugs. Vibration gone and that*s it.

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    Arrow Vibration at idle, gone with spark plug change

    Quote Originally Posted by ruthrj View Post
    Yes, Denso. Stupid autocorrect on my phone lol. Danko isn*t even a word is it?

    No NGK plugs in stock locally, and you*re right about the price. At 2x the price I can*t imagine NGK lasting 2x longer than the Denso plugs. No performance difference noticed between the old stock plugs and the Denso plugs. Vibration gone and that*s it.
    But you don't really know true compatibility issues unless after many more miles. I've learned lessons that cheaper is not necessary always better, and there's no free lunch. Mazda specifys OEM plugs which are made by NGK, so I go for OEM or at least the NGK's. Again, what are the stock plugs of yours as I heard Mazda did put Denso plugs in for early MY CX-5's, i.e. 2.0L, although only NGK's are used for later CX-5's from factory.

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    I*ll check on that for you tomorrow. Old plugs are out in the garage still.

    https://carfromjapan.com/article/car...one-is-better/

    This made me not care too much about *compatibility issues*.

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    Hah, left them in the house. Looking at the plug, it has these markings:

    mazda DILKAR7F PE01 18110

    Pretty sure that last number is a 0. Hard to read from the bit of crud baked in there.

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    Arrow Vibration at idle, gone with spark plug change

    Quote Originally Posted by ruthrj View Post
    Hah, left them in the house. Looking at the plug, it has these markings:

    mazda DILKAR7F PE01 18110

    Pretty sure that last number is a 0. Hard to read from the bit of crud baked in there.
    Your stock plugs are older version NGK DILKAR7F8 plugs. If you use Denso newer version ZC20HPR11 plugs with wider gap, it should be fine.


    Quote Originally Posted by Anchorman View Post
    All the plugs versions for these engines end 18-110. The early versions - PE-01 and PE-02 have been superseded by later interchangeable versions PE-5S and PE-5R.

    The only difference then is who made them PE-01 and the later PE-5R are made by NGK. PE-02 and the later PE-5S are made by Denso. Mazda no longer supply PE-01 or PE-02 although you might find old stock on ebay.

    To help reassure you, Iíve attached a screenshot from the online LIVE parts list - this is current as of now. If I try to select either PE-01 or PE-02 it comes up with a supersession box. In this screenshot you can see all these part numbers including the associated manufacturers plug and you can see that our OP has indeed got the correct plug. He could have bought Denso FC20HPR8 and he would still be correct. Heís basically taken the early Denso plug out and put the later NGK plug in - thats absolutely OK. So let me show it another way;

    Original version PE-01-18-110 (was NGK DILKAR7F8) is now PE-5R-18-110 (NGK ILKAR7L11)

    Original version PE-02-18-110 (was Denso FC20HPR8) is now PE-5S-10-110 (Denso ZC20HPR11)

    I would always fit the later version. All these modern iridium plugs are going to wider gaps to improve performance and in the later part numbers, both NGK and Denso show the factory set gap in the part number - so the last two digits - 11 equals 1.1mm. Here is that screen shot with the supersession;

    However, thereíre people here, including OrangeVirus Tuning, believe we should use OEM plugs which provide ion sensing function.

    Quote Originally Posted by GAXIBM View Post
    The plugs provide ion sensing for the engine computer. Some have used non oem (see engine misfires thread) and after a lot of diagnostic work the problem was fixed by replacing with oem...
    Quote Originally Posted by OVT View Post
    Without getting into too much detail...you guys really...really..really want to use OEM plugs....
    Quote Originally Posted by OVT View Post
    the reason is because the ECU uses the ignition coils, which measure a resistance across the OEM plug for pre-ignition, and extremely low levels of knock retard the knock sensor cannot pick up, along with that it gives the ECU individual cylinder information, the spark plugs are actually used "as a sensor."

    How it works exactly is proprietary information that I am not willing to share, you want to use OEM plugs.

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    Thank you! Should I run into any issues, back to OEM plugs for sure.

    EDIT: bang up job summarizing that other thread for me btw, greatly appreciated! I wonder if those misfire issues were caused by non-iridium plugs. Switching straight back to OEM plugs would be the best way to minimize variables when troubleshooting.
    Last edited by ruthrj; 10-14-2018 at 07:51 AM.

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    Glad the plug change worked out for you!

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    Quote Originally Posted by ruthrj View Post
    Yes, Denso. Stupid autocorrect on my phone lol. Danko isn*t even a word is it?

    No NGK plugs in stock locally, and you*re right about the price. At 2x the price I can*t imagine NGK lasting 2x longer than the Denso plugs. No performance difference noticed between the old stock plugs and the Denso plugs. Vibration gone and that*s it.
    How corroded were the stocks?

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    Not bad at all actually. Iridium tips were nice and clean. Color looked healthy, no flecks of anything present. Spot at the base of the insulator where the boot left it exposed was filthy brown though. About 2x the amount of oily residue going up the threads on spark plug from the rightmost cylinder (looking down at the engine from the front of the car). Gaps on the OEM plugs visibly smaller than the Denso plugs that replaced them.
    Last edited by ruthrj; 10-15-2018 at 04:37 PM.

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    Arrow Vibration at idle, gone with spark plug change

    Quote Originally Posted by ruthrj View Post
    Not bad at all actually. Iridium tips were nice and clean. Color looked healthy, no flecks of anything present. Spot at the base of the insulator where the boot left it exposed was filthy brown though. About 2x the amount of oily residue going up the threads on spark plug from the rightmost cylinder (looking down at the engine from the front of the car). Gaps on the OEM plugs visibly smaller than the Denso plugs that replaced them.
    You have older version of stock NGK plugs. Older version plugs have smaller gap.

    Quote Originally Posted by sergeyv View Post
    Workshop manual shows different plug on the pic though.


    Specification

    Spark plug type
    PE01-18110, PE02-18110

    Perhaps they're different from those in early models and 2016 has a different plug.
    Furthermore,

    Spark plug gap (PE01-18-110, PE02-18- 110)
    Standard: 0.75ó1.10 mm {0.030ó0.043 in}
    New spark plug (reference): 0.75ó0.85 mm {0.030ó0.033 in}

    Spark plug gap (PE5R-18-110, PE5S-18- 110)
    Standard: 1.05ó1.40 mm {0.0414ó0.0551 in}
    New spark plug (reference): 1.05ó1.15 mm {0.0414ó0.0452 in}
    I have never experienced any difference in ignition by installing a good NGK/Denso spark plug instead of OEM one. I've always used iridium or double iridium.

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    Resident barbarian ColoradoDriver's Avatar
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    For what it's worth...I replaced my spark plugs recently and went with OEM. Turns out they have NGK model numbers on them...

    I'll just get the NGK's next time.
    2014 CX-5 Touring AWD | Jet Black Mica - 74k miles
    01/2013 build | 4/20/2013 buy

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    Quote Originally Posted by ColoradoDriver View Post
    For what it's worth...I replaced my spark plugs recently and went with OEM. Turns out they have NGK model numbers on them...

    I'll just get the NGK's next time.
    And I got the NGK's which were half the price of the OEMs. OEM "Ion sensing" comments aside, the NGK's have been perfect.

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