Spark Plug Cap!

[johnbarry88]

Hey just wondering, people are saying change the gap from 1.1 to 0.8 how the hell do you do it? Use a fealer gauge to determain the size and just squish it down lol. I like to know how its done because my car has a very bad missfire at 3500-4000rpm and its pissing me off, the coil packs have been check and are all good and im using platnium plugs, ok my oxy sen is fuc*ed but thats been changed and no difference. I thought maybe because the 02 sen was rooted that coking of carbon on the plugs could be the problem but their fine now, but still have that missfire. The coils are indavidual ignitors so they dont have an ignitor seperatly, like on ser1 and early r33's.

I have a r33 1995 with a rb25det apparently ser 1.5. Can someone give me some true and related advice not just hand me over to another post please.

[RANDY]

That's the only way that I know of gapping a plug... granted, i've never done it myself, but that's my understanding of how it's done. The metal is quite strong.

As far as the missfire thing... the coilpacks are the popular fault of the month. You could double-check this though. Mine used to missfire if I was in a tall gear and put the boot right in.

Get the motor nice and hot, then stick it in 4th at about 60km/h, then boot right into it. Mine would missfire lower in the revs when I had faulty coilpacks and did this.

[johnbarry88]

mines auto and anything over 3500 it just miss's like crazy...

[Fixxxer]

Yes, use a feeler gauge to measure the gap, and either find a place to squish the tip against another surface or tap it on a surface, always checking again with the feeler gauge to see how close you are to 0.8mm. You don't need much effort to bring them closer so don't go crazy.

Conversely, do the right thing in the first place, and buy plugs that are already gapped at 0.8mm, saves you the hassle.

Fixxxer

[Busky2k]

To close the gap I just lightly tap the grounding strap against the ground. You'll eventually get a feel on how hard to tap it. To open them up, you need a thin pair of needle pliars.

[RANDY]

To expand on this... if it's happening all the time, I'd guess the packs are faulty. Unless you are running really high boost, gapping the plugs down is a hack to try and fix the coil pack issue.

With a smaller gap, it takes less power to jump the distance, and you might be lucky that the distance is less than where the spark is currently jumping out of the packs. This will also give you a weaker spark and weaker burn... so if gapping them doesn't fix anything, check and fix your coilpacks, and put new plugs with the standard 1.1mm gap back in.