Blown another spark plug same cylinder as before
Turbo Mini Forums

Guys I have a problem

I was running b8es plugs for a bit and I blew a plug I dont know which one as my gdad sorted it for me,

I came back home and it blew another b8es plug in cylinder 3 so andy told me my plugs were too cold and to try the old bp6es from my old engine, so I put them in and it ran so much better.

Went to drive the car tonight and guess what, back on 3 cylinders, popped the leads and cylinder 3 again


It cant be a pure co incidence?

Im running megajolt with the bigger coilpack and halfords own fiesta leads and when I ran bpr7es plugs it ran like shit till the b8es plugs were put it and it ran much etfer so im guessing I have resistive leads

Can anyone advise me as to why it keeps killing plugs?

Should I try champion plugs? I read somewhere a guy kept having ngk plugs die and went to them?

Cheers

Craig

Maths would suggest a 25% chance of pure coincidence, so it's not exactly ruled out..

Megajolt needs a resistor plug. and 8's are way too cold. 6's should be fine and 7's if you really really want to, but 8's are just a bit too much.

However, the fact that it is always the same cylinder, I would be checking cylinder compression pressures first, then leak down pressures

It could also be onset of detonation, so try pulling 4 degrees out of your map and see if things improve.

And what exactly is blowing a plug ?

A pic would be very helpful.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Ill see if my dad has a compression tester, the car isnt setup properly its running quite rich in the 10 - 13's afr at all times and sometimes it will lean out off the scale

Do I just take 4 off of all the numbers on the map?

Slark told me to get it run in and take it back to get it setup properly

Blown a plug - it just stops working

Doesnt look any different what so ever to the others just when I pull the ht lead off the engine makes nodiff

Edited by Craigie-B on 23rd Nov, 2012.

Triple post fail

Edited by Craigie-B on 23rd Nov, 2012.

I've been running non resistive 8's for 2 year with megajolt without fault for reference.

Im using an aem afr guage it only goes between 10 and 18 some times itll just display 10 and others it goes --- after the 17's

It usually drives within the 12's an 13's

pics of the plugs?

There very black and nothings visually wring with them, not at home so will get a pic tomorrow morn

try ngkbpr6es... fine over 20psi boost,
i kept dropping plugs all over the shop and the afr go off the scale lean i havent dropped a plug since

Yes i moved to the darkside

Instagram @jdm_brett

also, try some denso's or champions in there,

Ill get some bpr6es tomorrow and see how it goes ill look at champions after that

Thanks or the help guys

what gaps are you running on the plugs?

Speeding is like masturbating, everyone does it, but not all of us film it and put it on the internet

[quote=fab,8th Oct, 2010]fuck off

We had similar problems early on with the tt. It was all sorted when the fueling was sorted. Going too rich can kill plugs, no matter who makes them.

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9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Craig you puff, you've put unknown used plugs in and they have died. Hardly surprising. Stop being a tight arse student and put some new ones in!

Craigh can you post a pic of your megajolt map for us?

Craig i can meet you and get them with my trade card if you want

I already got some :( was 2.20 each, thanks anyway wolfie would be good to meet up at some point anyway :)

Benross I will get the map after I have finished my soup :)

edit:

Forgot to mention I was driving the car around today. I kept my eye on the AFRS and it was between 11's and 14's at all times (obv varying) whilst driving. Theres a flat lean spot at around 1500rpm - 2000rpm but thats always been there.

Spark plug hasnt gone yet and I put about 20 miles on it before the heater tap exploded

Edited by Craigie-B on 24th Nov, 2012.

cheap chinese knock off plugs may be part of the issue,

IMO the ceramic on cheap plugs is more porus making them more prone to fouling, not so much of an issue on a good micture, but if your down at 11:1....

yeah, it doesnt run at 11.1 for long its mainly in 12 and 13

Heres the map

Even 12/13 during normal off boost driving is quite rich. You should be looking to see high 13's at least for normal driving.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will