Check your plugs!

[MikeHTally]

$72 for plugs? they better be gold plated or something

Seems about right if it includes labor.

 

[MikeHTally]

I just visited NGK's site -- they say they don't have a plug for the Speed. What's up with that?

 

[8.5MS3]

.028 I am not sure but that is a bit narrow. .032 to 035 sounds a lot better to me

.03 is the stock gap, .028 is recommended for i step colders. with the gaps you listed you'll be throwing misfire codes all day

 

[BillTheCat]

I just visited NGK's site -- they say they don't have a plug for the Speed. What's up with that?

Looks like NGK's web site is only updated thru the 2006 model year. Looking at the '06 MS6, it appears they recommend NGK Iridium part #ILTR6A-8G, which is stock #3787, pre-gapped to .032.

 

[MSMS3]

Looks like NGK's web site is only updated thru the 2006 model year. Looking at the '06 MS6, it appears they recommend NGK Iridium part #ILTR6A-8G, which is stock #3787, pre-gapped to .032.

+1. NGK's heat range numbering is range 6 (first number after ILTR). One step colder is range 7. That plug is in the Iridium IX line and is LTR7IX-11.

Gap on the stock plugs is .032. If running Cobb AP, Cobb definitely wants you to run the colder plugs and to gap them down to .026-.028:

http://www.accessecu.com/accessport/mazda/AP-MAZ-002/MS3Maps.html

Go to that link and then read the bold print pdf document in the technical document section.

 

[derspi]

FWIW, depending on your driving style and/or needs, the step colder plugs may not be necessary. I pulled out my Denso ITV22s after about 10K kms. and they were quite sooty and looked in way worse shape than the stock plugs that had more mileage on them. I do almost exclusively city driving and don't really get much of a chance to open her up much and even if I do, it's only for very brief bursts so at the advice of my mechanic friend, I decided to just put the stockers back in. BTW, I pulled the Densos because I was getting some hesitation on WOT and after inspection, I'd suspect it was because of the soot buildup from the plugs not getting hot enough.

 

[8.5MS3]

FWIW, depending on your driving style and/or needs, the step colder plugs may not be necessary. I pulled out my Denso ITV22s after about 10K kms. and they were quite sooty and looked in way worse shape than the stock plugs that had more mileage on them. I do almost exclusively city driving and don't really get much of a chance to open her up much and even if I do, it's only for very brief bursts so at the advice of my mechanic friend, I decided to just put the stockers back in. BTW, I pulled the Densos because I was getting some hesitation on WOT and after inspection, I'd suspect it was because of the soot buildup from the plugs not getting hot enough.

gotta do autox every weekend lol. keeps the plugs good, but at the expense of tires

 

[leadf00t]

FWIW, depending on your driving style and/or needs, the step colder plugs may not be necessary. I pulled out my Denso ITV22s after about 10K kms. and they were quite sooty and looked in way worse shape than the stock plugs that had more mileage on them. I do almost exclusively city driving and don't really get much of a chance to open her up much and even if I do, it's only for very brief bursts so at the advice of my mechanic friend, I decided to just put the stockers back in. BTW, I pulled the Densos because I was getting some hesitation on WOT and after inspection, I'd suspect it was because of the soot buildup from the plugs not getting hot enough.

I had the same thing happen. I thought the hesitation I was gettig was from KR at wot with the ap stage 1, but I had to sell it, so I sold it with the plugs. When I pulled the plugs I thought they looked a little dirty for only being in the car for 2k, but cleaned them up & shipped them out with the AP. After putting the stock plugs back in I still see the same kr at wot .07-2, but there is no hesitation like before. So my plugs must have been the cause.

 

[boomshakalaka]

could i get new pluggs with only bpv, inlet, intake, cat back exhasut?

 

[8.5MS3]

could i get new pluggs with only bpv, inlet, intake, cat back exhasut?

only needed if running more boost. so you could but its not gonna do anything really

 

[boomshakalaka]

only needed if running more boost. so you could but its not gonna do anything really

o ok, thanks, because i was reading and people were saying its smoother acceleration, or something like that lol..