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New Plugs now a lopey Rev

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Old Sep 22, 2008, 09:30 PM
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New Plugs now a lopey Rev

I put in new BPR9ES plugs gapped to .022. When i rev to say 2.5k RPM and hold it, now it kinda has sort of a lope sound in it. Almost hesitant. I also threw a P300 random misfire once. It never used to do this before during slow revving. It was always smooth. Am i using the wrong gap? What else could it be?

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Old Sep 22, 2008, 10:46 PM
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what was wrong with the stock plugs?
Old Sep 22, 2008, 10:53 PM
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24k miles. wanted to swap them. anyone have any idea? my friend is saying to re-gap.
Old Sep 23, 2008, 12:31 AM
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Did you mistype or did you really go to colder plugs for no reason?
Old Sep 23, 2008, 06:58 AM
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was told to get these plugs.
Old Sep 23, 2008, 01:19 PM
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Originally Posted by mrdecrypter
I put in new BPR9ES plugs gapped to .022. When i rev to say 2.5k RPM and hold it, now it kinda has sort of a lope sound in it. Almost hesitant. I also threw a P300 random misfire once. It never used to do this before during slow revving. It was always smooth. Am i using the wrong gap? What else could it be?
Thats a wrong plug! BPR9ES plug is for Evo 8 man!
Old Sep 23, 2008, 01:21 PM
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Yes, you put wrong plugs in, those are for the 8 and are shorter plugs. Swap the stock ones back in or purchase some new plugs for the 9.

Stock heat range:
NGK - ILFR7H
Denso - IKH22

1 step colder:

Denso - IKH24
Old Sep 23, 2008, 03:33 PM
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Originally Posted by evovin
Thats a wrong plug! BPR9ES plug is for Evo 8 man!
LOL. I thought I recognize that spark plug number to be for an Evo 8
Old Sep 24, 2008, 07:18 PM
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yea i figured this out a few days ago. swapped them with the correct plugs and it is running great again. thanks!
Old Sep 25, 2008, 11:16 PM
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by the way, i gapped them to .026 and my ride still kinda hesitates a little. a very minor bit. should i close the gap more?
Old Sep 26, 2008, 05:34 AM
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I bought the IKH24s and the thread is a lot longer than the stock plugs. That a problem?

Originally Posted by razorlab
Yes, you put wrong plugs in, those are for the 8 and are shorter plugs. Swap the stock ones back in or purchase some new plugs for the 9.

Stock heat range:
NGK - ILFR7H
Denso - IKH22

1 step colder:

Denso - IKH24
Old Sep 26, 2008, 06:28 AM
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Originally Posted by brandEvO
I bought the IKH24s and the thread is a lot longer than the stock plugs. That a problem?
the threads are longer than the stock plugs or the plugs you have in there now (the wrong plugs)? The evo IX plugs have longer threads then the VIII plugs which is why they are not interchangeable.
Old Sep 26, 2008, 08:02 AM
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Originally Posted by mrdecrypter
by the way, i gapped them to .026 and my ride still kinda hesitates a little. a very minor bit. should i close the gap more?
Dude. You've been toldyou bought the wrong plugs. If you're not gonna take advice then don't ask for any!
Old Sep 26, 2008, 08:07 AM
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Originally Posted by BBS
Dude. You've been toldyou bought the wrong plugs. If you're not gonna take advice then don't ask for any!
Might want to actually read all the posts before you go blasting someone.

Originally Posted by mrdecrypter
yea i figured this out a few days ago. swapped them with the correct plugs and it is running great again. thanks!
Originally Posted by mrdecrypter
by the way, i gapped them to .026 and my ride still kinda hesitates a little. a very minor bit. should i close the gap more?
Old Sep 26, 2008, 12:35 PM
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+1. BBS is tripping out *weirdo*

Service manual says IX plug gap should be .020 to .024 spec. I gapped my Denso IKH24 to .020.


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