R32 Gtr Misfire

[ali-turko]

hey guys

i just replace my spark plugs with irdiuims (spelling)

to .7 same as previously and now i got this misfire over 7000rpm

can anyone help please?

[ali-turko]

anyway i changed my plugs again then i took it for a drive everything was perfect, until the next morning driving to work i give a little bit and a notice a small misfire.

i go for a drive at lunch time its a pig again idels shit aswell,

can someone please help and yes iv searched

[DVS JEZ]

just buy cheap bosch plugs, if you gapped the iridiums you might have cracked the tips,

get bosch cheapies

[gazza750]

never try to regap iridiums they are set at either 0.8 or 1.0 for a reason if you wanna run a smaller gap use ngk or bosh cheapies

and a 0.7 gapis prolly the reason you are getting the missfire

i run ngk @1.0 mm and never have a problem

[ali-turko]

but thats the thing race pace gaped my periously irudiums to .7

and now this my second set off the plugs this week iv got platinum's now,

but what i dont under stand is why is mis firing same plugs same gap,

this is really pissing me off

[GTR1993]

Iv regapped iridiums before with no problems

[gun32gtr]

i just run platinums.gap of 1.0 i think,never had a prob

[ali-turko]

perviously as stated iv gapped them b4 with no problems just un plug my coils one at a time and the idle change on every one, so its not the coils

[ali-turko]

and it was running perfect last nite straight after i changed them, but i only when for a quick drive to see if the misfire went away

[markimak]

haha

i run DENSO platniums in mine was 1.1 and it was missing. so i got feeler guages and a brick and regapped them my self to 0.8mm.

plug tips are designed to take a beating think of the compression and explosions it takes in the head...

[ali-turko]

would it misfire if the gap is to small

??

[gazza750]

it ould be the ignitor playing up under load

[ali-turko]

but it even idles like a pig now and can hear it mis, also if when slowly rev it(no boost) still misfiring

[ali-turko]

again i had f**k all of a mis fire b4 i changed the plugs,

[markimak]

coils maybe.. just did them on the R34. my GTR ones are fine.

AFM..?

does it ever go into safe mode.?

[ali-turko]

i tested the coils, the afms r fine they were working perfectly b4 i changed the plugs and whats safe mode?

[ali-turko]

thhis really starting to piss me off, i just tryed the copper plugs aswell, 1st i gapped them 2 .8 was a lot better but still had a miss above 7000rpm, then i gapped them to .7 was fine for the first drive to the car wash, i washed my car driving home from car wash missing like a bitch again,

i wanted to fix this b4 the cruise tomorrow, please help someone

[ali-turko]

any body else??? im also getting bout 250km per tank from 400km per tank,

if i cant solve it will be gong into a workshop to being looked at, not that i have the money to

[DVS JEZ]

perviously as stated iv gapped them b4 with no problems just un plug my coils one at a time and the idle change on every one, so its not the coils

that doesnt eliminate the coils at all...

only if the miss is at idle...which its not.

try a new set of coils dude, swap with a mate or something, cheaper than going to a shop,

[godzl1975]

could be n injector or injectos playing up...had problem with the one of the injectors and mis fire @ idle and under load..so just a suggestion, check injectors