Spark plug gaps

[doommachine]

Hey guys,
Did a search already, no results, anyway, the car is running a bit funny, no doubt due to the extremely restricted exhaust and tiny turbo D), anyway, the thought occured to me that I should probably check my spark plug gaps at some point. (I don't expect it to alleviate the problem, it was just a thought I had about 5 minutes ago reading all the people with ignition problems on the skyline forum.. ahh, Nissans.. love em)

As the car is modified normally, should I use a different plug gap to what mitsubishi recommends? I assume I'm using a different heat range plug to normal.

Also, should I still check out and regap the plugs every now and then, or will the gap remain correct until the plug is cactus? Oh, also, a lot of people whinge about ruined coil packs in Nissans, and our coil packs are remarkably close to the engine.. any issues there? Is there some way I can test the coil pack?

Cheers,
Daniel

 

[Entaran]

Your search wasn't very thorough.

Check your plug gaps. They should be 0.8mm in a vr4. Once they are set, they are fine until your plug is cactus. CHeck your plugs every 5000 or 10000 km... whenveer you service. Expect to replace every 2nd or 3rd service.

I've never heard of the coil packs going bad often. I assume it happens, but it's not a major issue.

Plug gap should be the same (it's about spark power). You might benefit by changing the heat ranges however.


http://forums.team4g.com/viewtopic.php?t=1329

Check those service manuals I mailed you.

-------------------

DSM - GVR4 - Engine Mech -> Page 42 down the bottom.


2. The new plugs should be checked for the proper gap.

Spark plug gap:

<Non-Turbo> 1.0-1.1mm (.039-.043 in.)
<Turbo> 0.7-0.8mm (.028-.031 in.)

 

[bazeng]

out of the box they are 1.1mm in the NGK's i believe

they seem okay on mine at 1.1mm n/a though..

 

[doommachine]

Entaran,
I found the thread with the stock spark gaps no problems, however I couldn't find anything relating to plug gap + modifications. So I assume from your answer that just the heat range is important, and the gap can remain as stock?

 

[Entaran]

More or less.

 

[JSTYLE]

i run my gaps at .6 factory they are 1.1 but at high boost plugs can jump so i gap them closer.

i have no problems with coil packs/ignitors at this gap.

Jon

 

[doommachine]

Nifty, thanks.