Hi, got some plugs today pfr6b do i need to check the gap before fitting if so what should they be gapped too

cheers

 

Yes, i would check the gaps. I have had them any where from 1mm to 0.5mm out of the box.

 

cheers bud but what does the gap need to be can't find it anywhere on the old google

scrap that i found a thread on here saying pfr6b are done at 0.8 and are good..

 

If you are running a little extra power/boost, it will be worth closing a little to 0.65mm-0.70mm, or even upgrading to 7's.

 

I would definatly upgrade to 7's. And gapped to 0.65mm.

 

0.65-0.07mm is a good setting for the plug (a larger gap can cause a missfire under full throttle). You would use a 7 heat range if you are running more power than std.

 

^^ I'm using 8's at that gap which are fine at 1.5bar yet mis-fire at 1.8bar ... any ideas why that might be (car is circa 450hp)?

TX.

 

what make and code ?

 

NGK Racing 8's ... I'll post the code when I get home

TX.

Edit - found it, R7435-8.

 

just managed to get a plug out of my 96 wrx its is a denso k20pr-u find it a bit strange after buying ngkpfr6 and paying someone to fit them has anyone elses sparkplugs changed there name after being fitted .only diffrence from standard is a decat pipe what plugs shall i get now after being on here and nesf im sure i can change them myself now so cheers for that .

 

I run R7434-8 which have the smaller tip and no probs at 2 bar
i'd take yours out and check the ceramic has no cracks . easy way to check is with dirty fingers rub round the ceramic and if there is a crack the dirt/ grease will show the crack up
check gapping 0.65 and if no joy i'd check coil pack /packs

 

checked the coil packs mate and found 1 bust thats why i pulled a plug out ,not checked the rest yet but cant see them fitting some and not all the plugs altho anything is possible .the plug i got out was snapped think i did it got socket stuck but suspect it may have been damaged anyway as i didnt go to mad got more time tomora to have a tinker if i can get some plugs ,cheers for the reply .

 

thats amazing why would someone do that, unless they couldn't do the job after they broke the coil pack, btw what size socket is it for plug change i think it is 16mm deep

 

just done them mate had denso plugs all bollaxed and yeh 16mm put some plasters on ya knuckles before you start wish i had lol

 

plugs done mine were all bosch R and all seemed in awesome condition, they were all a very light beige colour, dissapointing to find though they were all exteremly loose as in almost finger tight,

 

what plugs did you put in i went with the advice and got the 7s cpl of my coil packs were dddone aswell feels like a new car been running like a bag of hammers for months ,i had paid £90 to fit a set of coil packs and a set of ngk 6s (some mate eh)strange i took 4 denso plugs out gapped at 1mm and three coil packs were cracked BEWARE OF MEN WITH OILY HANDS

 

lol i fitted 6's to mine does feel smoother coming onto boost still a slight bit of hesitation at around 6k though but it's coming of boost then so i don't mind,

 

mine feels good but think ive got a dogey driveshaft so dont wanna give it to much till i sort it ,never seam to have it bang on always something to do on them

 

i am doing great with mine in the past year all it has had is a radiator 2 fuel pumps a different tmic, iacv, maf and plugs oh and avc-r