Colder plugs in the MS3, whose using them?

[silverspeed03]

I'm getting spark blowout pretty bad now and wanted to know what plugs you have upgraded to and what you gapped them to. I'm still on the stock plugs and this problem is bugging the hell out of me.

Example
Plug: (Copper) NGK.....?
Gap: .04?

 

[knowledge007]

First of all, this car runs iridium plugs. There is no better plug. If you are having problems take the car to the dealer if you still can.

 

[Dream]

What the heck is spark blow out?

 

[silverspeed03]

iridium plugs are not worth it. Copper plugs are just as good and a hell of a lot cheaper. It's your money.

 

[knowledge007]

My money, they come iridium stock. So wtf are you talking about. Like I said, take the friggin car to the dealer.

 

[silverspeed03]

Why the **** would I take it to the dealer?
Do you even know what spark blowout is?

 

[silverspeed03]

Anybody else that KNOWS what they are talking about.

 

[knowledge007]

I really don't give a **** what it is. If your having a problem and you are referring to the spark plugs then why do I need to know wtf spark blowout is. If the car is still under warranty and you haven't been voided yet then why wouldn't you.

Dream asked you what exactly spark blowout is. Instead of trying to demeanor me, why don't you answer the question.

 

[silverspeed03]

First, I'm not trying to insult you or your intelligence. So sorry if I came off that way. All I was saying is that IMO if you have to replace the plugs why spend $10-$15 per plug for iridium's when I can get (4) copper plugs for $15 that IMO are just as good. A lot of people with turbo cars run copper plugs in the MSP & SRT-4 crowd.

As for spark blowout. It's when you get sputtering/backfiring at WOT. any kind of sputtering is usually ignition related. I think a lot of people misinterpret this for fuel cut, it's not. I have experienced fuel cut on my MSP before and this is nothing like it. This is like a very quick succession of popping and sputtering. I was told by Justin at JMB Performance (very knowledgeable guy) to bump up to a colder plug and close the gap to .040.

 

[ElBartoRex]

what he is talking about happens when your plugs are gapped too wide, though I have never heard of it referred to as 'spark plug blowout'.

One step colder plugs are only recommended for cars running around 100hp over stock.

 

[knowledge007]

First, I'm not trying to insult you or your intelligence. So sorry if I came off that way. All I was saying is that IMO if you have to replace the plugs why spend $10-$15 per plug for iridium's when I can get (4) copper plugs for $15 that IMO are just as good. A lot of people with turbo cars run copper plugs in the MSP & SRT-4 crowd.

As for spark blowout. It's when you get sputtering/backfiring at WOT. any kind of sputtering is usually ignition related. I think a lot of people misinterpret this for fuel cut, it's not. I have experienced fuel cut on my MSP before and this is nothing like it. This is like a very quick succession of popping and sputtering. I was told by Justin at JMB Performance (very knowledgeable guy) to bump up to a colder plug and close the gap to .040.

Now we are getting somewhere. This is very interesting as I am experiencing the same exact thing you have described. Only occasionally though. I have also had some problems with startup. Where I have a slight hesitation. Sort of like the hesi when the standback is installed. BUt I have removed teh standback. Do you think the two are related to the spark plug issue?

No CEL's bTW.

 

[silverspeed03]

what he is talking about happens when your plugs are gapped too wide, though I have never heard of it referred to as 'spark plug blowout'.

One step colder plugs are only recommended for cars running around 100hp over stock.

That was the term I thought best described my situation and what I've heard, whether or not that is correct terminology or not, I have no idea. So you recommend just closing the gap and not going with a step colder? Would you think I would fowl out colder plugs?

 

[silverspeed03]

I also have no CEL's?

I wouldn't dismiss the possibility of them being related. I mean it really sounds like it could be. My particular issuse is from 3-5 gears and from 3.5k-4k RPM to Redline, well 5800 RPM.

 

[silverspeed03]

I'm still running the stock plugs/gap. That's why I'm wondering if anyone else has upgraded/re-gapped.

But this is good. So, you too have/know what I'm talking about? This is very frustrating.

 

[knowledge007]

Yes it is.

 

[fourthmeal]

Question, have you ruled out low fuel pressure at the rail at WOT near Redline? Something that the stock CDFP can render?

 

[silverspeed03]

Well, wouldn't that cause me to go lean? MY AFR's are pretty rich 10.4 -10.7 at WOT.

 

[Haltech]

First of all, this car runs iridium plugs. There is no better plug. If you are having problems take the car to the dealer if you still can.

Iridium plugs suck... they crack at the slightest sign of detonation. A smart person runs a 1 step colder plug and its a copper one. You may get a slighter rougher idle, but the longevity of the plug itself and the safety factor makes it worth it. 18+ psi i would consider experimenting with a colder, NGK copper plug.

 

[fourthmeal]

From what people have datalogged, the engine will show rich, but the ECU will pull spark (or some other kind of cut,...this is a new topic of study for me still) if the CDFP can't meet the demands of the engine. You'd never show

Certainly worth looking into.

 

[nig3]

First, I'm not trying to insult you or your intelligence. So sorry if I came off that way. All I was saying is that IMO if you have to replace the plugs why spend $10-$15 per plug for iridium's when I can get (4) copper plugs for $15 that IMO are just as good. A lot of people with turbo cars run copper plugs in the MSP & SRT-4 crowd.

As for spark blowout. It's when you get sputtering/backfiring at WOT. any kind of sputtering is usually ignition related. I think a lot of people misinterpret this for fuel cut, it's not. I have experienced fuel cut on my MSP before and this is nothing like it. This is like a very quick succession of popping and sputtering. I was told by Justin at JMB Performance (very knowledgeable guy) to bump up to a colder plug and close the gap to .040.

its fuel cut nig... trust me. its not spark blow out. your friend doesnt know that this motor come with hot ass iridium plugs already with high compression and direct injection. If you put a colder plug your problems will get worse. everyone with a modded ms3 has this same exact issue. the only way around it is this-->>>http://mazda3online.web.aplus.net/product_info.php?cPath=281_160_400&products_id=1038
or wait for a reflash or turn your boost down alittle. peace out!!