Sorry bud but I dont think your blowing out spark. My guess is its the same thing me and laloosh have had problems with many times. Once the the ecu senses the fp losing pressure it does something to the car that feels like spark blow out. Its pulling timing and closing the throttle plate. You need more fuel. Are you running over 22psi? If not its no way spark blow out. They are gapped at. 28-32 from the factory.
Colder plugs in the MS3, whose using them?
- Thread starter silverspeed03
- Start date
My car still did it at those afr's. its a very sensitive car.
ElBartoRex
Member
you can't re-gap iridium plugs, they come gapped properly for the application from the factory. Trying to gap iridiums will ruin the tip. I agree that you aren't experiencing a lost spark but rather fuel cut.
I have been having this same problem. The sputtering/backfiring sounds come in quick succession in third gear above 3k rpm. I have no CEL and running stock boost.
My mods are: CPE-CAI, CPE-TBE, TurboSmart BOV (recirculating), 3.25 ETS and Billet REM.
My mods are: CPE-CAI, CPE-TBE, TurboSmart BOV (recirculating), 3.25 ETS and Billet REM.
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Indeed you can, albeit VERY carefully. When I had my SRT-4 the colder iridiums I ordered came gapped at like .052 or so. I gapped them down to .032-.035. As far as the factory gap on the MS3 being in the lower .030s, I don't think spark blowout will ever be an issue unless you can squeeze 400+ HP to the wheels, which as far as I know, hasn't been done (a SHAME). Now that the CDFP has given us some hope of making at least decent numbers on the dyno (which numbers are overrated anyway, it's all about how you make the power IMO) I can't wait to see what kind of power the stock motor can make. SRT-4s and EVO's can make 400-475 WHP on stock internals.......... surely we can hit 375-400 or so (dunno). Anyway, from the research I've done I'm leaning toward fuel issues, not spark blowout. You need to be making some serious boost to blowout a spark, ESPECIALLY when the plugs are gapped as low as .030. Just my 2 cents.......
ill_eagle94
Member
- :
- 1990 Mazda Miata
And me! (help)
I can't wait until PG gets the parts for more pumps. I've got the money ready.
silverspeed03
Boost Junky
- :
- 2008 MS3
I've experienced fuel cut before (different car) though and this is not like I'm hitting a brick wall where power/pull just stops. I keep pulling to my shift point it just sputters getting there. I have always thought that when the fuel is cut it's cut, your car no longer continues to pull.
Are there different degrees of fuel cut?
Factory gap is .030?
silverspeed03
Boost Junky
- :
- 2008 MS3
Well, the Fuel Pump is on my list. I guess I'll be getting one sooner than I previously thought.
Is CPE having the same problems with their Fuel Pump that PG is having?
Any word on a release date yet?
Is CPE having the same problems with their Fuel Pump that PG is having?
Any word on a release date yet?
Denso makes some one step colder iridium plugs if im not mistaken I'll probably be giving those a try in the MS3. The Denso ITV20 According to the denso site they are a colder plug. they list the gap on the site as .044 for the 2007 MS3. If they are so fragile as Haltech said I may try the one step colder copper ngk's.
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silverspeed03
Boost Junky
- :
- 2008 MS3
you guys should visit the MS6 forums
Denso doesn't make plugs for your MZR
NGK makes a replacment and a 1 step colder plug
HKS has plugs as well if you need JDM badging and want relabeled NGK's that say HKS
anyway,
I've had 1 step colder NGK's in my speed6 for at least 6 months
they will have to be gapped to the factory setting
you can gap irridium plugs if you are careful, know what you are doing and are not an asshat
as far as I could tell when I was looking into spark plug offerings a early 2007
I could not find any plug company that offered anything for the MZR but an irridium plug....you will most likely not find a copper plug
Maybe since then some things have changed but I doubt it
here are all the part numbers you'll need:
stock replacement
NGK ILTR6A8G
NGK LTR7IX-11 (1 step colder)
I have my LTR7IX-11's gapped at .032 - car runs great
I also ordered from clubplug.net which is by far the cheapest you'll find
Denso doesn't make plugs for your MZR
NGK makes a replacment and a 1 step colder plug
HKS has plugs as well if you need JDM badging and want relabeled NGK's that say HKS
anyway,
I've had 1 step colder NGK's in my speed6 for at least 6 months
they will have to be gapped to the factory setting
you can gap irridium plugs if you are careful, know what you are doing and are not an asshat
as far as I could tell when I was looking into spark plug offerings a early 2007
I could not find any plug company that offered anything for the MZR but an irridium plug....you will most likely not find a copper plug
Maybe since then some things have changed but I doubt it
here are all the part numbers you'll need:
stock replacement
NGK ILTR6A8G
NGK LTR7IX-11 (1 step colder)
I have my LTR7IX-11's gapped at .032 - car runs great
I also ordered from clubplug.net which is by far the cheapest you'll find
See photos here of stock MS3 spark plugs
http://www.mazdas247.com/forum/showthread.php?t=123678245&highlight=spark+plugs
http://www.mazdas247.com/forum/showthread.php?t=123678245&highlight=spark+plugs
About Denso
http://www.densoiridium.com/find_part_specs.php?id=25063
If you goto their website and go under 2007 Mazda you'll see the MZR engine listed..
2007 MAZDA 3 MAZDASPEED 2.3 L - L4 MZR N/A N/A N/A Plug = ITV20 Gap = 0.044
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Stuttering and sputtering are different than hesitation from fuel pressure drop. I had both of these problems and the stuttering/sputtering went away after i replaced the stock spark plugs. Two were cracked. I still have the hesitation from fuel pressure drops.
BTW, these spark plugs are not cheap and definitely not $10-$15 dollars each. I paid $85 for a set of 4 from the dealer and that was with a valued customer discount.
BTW, these spark plugs are not cheap and definitely not $10-$15 dollars each. I paid $85 for a set of 4 from the dealer and that was with a valued customer discount.
cool - that's new
I'm confused about the .44 gap....good luck with that
that's a pretty big gap compared to the factory setting
silverspeed03
Boost Junky
- :
- 2008 MS3
So you think my issue sounds like a plug problem and not a fuel cut problem? (confused)
silverspeed03
Boost Junky
- :
- 2008 MS3
I want to try new plugs but, if they cost $85 for four IDK.
Those plugs must be pure gold b/c Denso's ITV20 are 10 - 12 $ each.
Yea I'm wondering if maybe Denso thought that was the optimal gap for the MZR.
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It's worth a try because the dealer will most likely reimburse you like they did in my case. They were pissed that they didn't find the problem themselves after 3 visits and complaints of stuttering, but when I told them I found it, the wrote up a dummy work order and reimbursed me.
My original thread is here:
http://www.mazdas247.com/forum/showthread.php?t=123656333&highlight=stutter
