Jump to content
SAU Community

Recommended Posts

recently i have been having a bad missfire when ever i hit boost over 6psi. i tryed getting new spark plugs and gaped to 0.8mm, no change.. taped up the coil packs to try and stop them from arking out on the engine, but no change. put a heap of tape all over the coil packs, but if anything it only changed and got a little better, but still had a bad missfire.

but i found out of a mate, that there is another way to stop the coil packs from arking out and causeing a miss fire, apart from all of that and apart from using silicon, which can be realy messy. you can actualy paint pretty much all the coil pack with cheap clear nail polish.

1. pritty much its fairly simple, go to priceline or some cheap store, and buy the cheapest and gluggyest clear nail polish you can find, and get 2-3 bottles of it. i went through 1 and a half, but they where large.

make sure it is only clear and not coloured as the coloured ones do somtimes contain metalic parts i think.

2. take your coil packs out and unscrew them from the mounting racks.

post-22516-1154014242.jpg

ya can see the tape is still on them in the photo, but take it off and clean the stickyness left behind

3. to make sure that the nail polish bonds corectly with it, ya need to clean the coil packs fairly well with metho and a damp colth. use metho because it will evaporate.

4. then with the bush that came with the nail polish start brushing it on generously. but not so much that it runs off because it does need to dry still.. but also make sure that it has a desecent thickness to it as well.

i covered pritty much all of the coil pack, from up at the plug, all over the main body, all the way down the rubber boot to the edges of where it fans out like a cone.

post-22516-1154014325.jpg

5. alow them to fully dry before putting it all back together.. last thing you want to do is be pulling it all apart again because ya scratched a bit of the nail polish off.

at first i did not this this would work, but after trying everything else apart from buying new coil packs, i figured it was worth a shot, and it works.. havent had a miss fire since i did it.

keep in mind, this is just a patch up job. it wont last for ever, and will need redoing every few months.

hope this helps guys!

Link to comment
https://www.sau.com.au/forums/topic/127884-bad-missfire-on-boost/
Share on other sites

  • 5 months later...

I used High Temp Silicone on mine. I seem to remember other people thinking the nail polish idea would not withstand the temperatures?

If it withstands temperatures and is non conductive, it should work. Would be much easier to use than the silicone if it does work.

  • 1 month later...
I used High Temp Silicone on mine. I seem to remember other people thinking the nail polish idea would not withstand the temperatures?

If it withstands temperatures and is non conductive, it should work. Would be much easier to use than the silicone if it does work.

Just found this thread whilst browsing, probably dead & buried now but for the record, fellas if nail polish works short term then electric motor winding varnish may work even betterer? 3M put out a product, real sticky stuff, available from your friendly electrical supplier, (rexell, auslec etc) that sparkies use all the time when reco-ing electric motor field windings & armatures, comes in your handy spraypak, (shake well) can be a watery reddish color, takes a while to dry but is good stuff never the less.

Maybe worth a try for those that don't want to go Splitfire or to eliminate/determine if coilpaks are causing misfire problems. Can't remember temperature range (50deg C wet) but electric motors do run warm. Don't forget to mask off the bits you want to keep on conducting before spray-paking & as always, remove all oil & grease.

Just found a can of what I was waffling about (Scotch 3M 1602 - red/1603 is black) in the shed, looking at the ingredients it would pay to try a dob on a small area or an old coil first in case it attacks the coilpak coating. Could be a bit savage Acetone etc., :D

Around what?

Where mine were breaking through was from coil housing to the mounting frame that goes around and through the body of the coil.

No way that you can get normal tube heat shrink on there.

Self vulcanising tape would be a possible, but it wouldn't like the heat. There is also heatshrink tape out there, but it's too expensive.

If anyone is misfiring *BECAUSE OF BOOST* check your spark plugs gapping. Anything over stock boost you MUST gap them to 0.7 and then you will not be getting misfire. If this does not work, your coilpacks have bitten the dust and you might as well get splitfires. Slidingperformance.com does great deals on splitfires, I think they are 565 odd bucks form him delivered (Slides). Good luck.

Why spend money when you don't have to?

Closing the gap to 0.8 is usually enough, though going a little bit tighter can be an option but isn't a MUST.

Doing a bit of DIY, strapping and cleaning the coil packs, getting a nicely running machine again, without just ripping out the wallet sounds like a much better situation to me.

linky to hks drag car running std coils. http://www.skylinesaustralia.com/forums/in...howtopic=157076

Edited by heller44

I had same problem on My car, this mod with coils was unuseless for me, i change my Fuel filter and remove catalizer and now its fine, boost is more than 8 PSi and i didnot have any modification on my R33... but car is much faster now

Some of us dont like nissansilvia.com drift-spek tempo mods to our coil-packs, so new ones or splitfires will do. Splitfires are the ultimate choice and if you have damaged coil-packs I strongly recommend them. They ARE the best descision for a long term fix IMHO.

I had same problem on My car, this mod with coils was unuseless for me, i change my Fuel filter and remove catalizer and now its fine, boost is more than 8 PSi and i didnot have any modification on my R33... but car is much faster now

What you on? :)

  • 1 month later...

i had a bad missfire replaced coils put new spark plugs in and gapped them resett the ecu but noting

i grounded the black wire of the solinoid and plugged the vacume line from the exfactuator to the cooler piping nipple and the miss fire was compleatly gone its just a realy bad earth the car will run 5-6 psi of boost but a t pice or a boost controler will fix that worked for mine hasent missed fired since

  • 1 month later...

Also while the coilpacks are out get some fine sand paper and remove the spring from the coil pack normally pulling should pop it out.

Gently sand both ends of the spring to remove and deposits then roll up the sand paper and sand the inside the coil pack where the spring sits. It should now change from a tarnished colour to a nice and shiny colour.

push the spring back in and replace the coil packs and not will spark a lot better.

Also addin a grounding kit will improve the sparking as well

Edited by Captain Drift
  • 11 months later...

Hi guys just a quick intro as im quite inactive to the forums,

the names andee, drive an autech version 4 door series2 r33 (silver)

mods include

dish mags, 265 rubber on back wheels!!!

coil over bridgestone njp shocks

full trust exhaust (no cat) from turbo

Nizmo tv dash cluster with the epson ej1 driving computer( on screen g-force, tacho speed etc)

hybrid front mount cooler and plumbing

and strut brace under hood

THIS NAIL POLISH THING WORKS!! i been misfiring under boost for almost a year now and it comes and goes, so today i read the thread and bought the nail polish a little sceptic that it might not work, pulled em out, cleaned em up and painted the bastards, AND LOW AND BEHOLD it fixed it up, ok its a little bit missy right up top end BUT that to might just be the shit fuel i used aswell!

keep you all posted as this progresses, so far so good thou!!

Thanks Guys

andee R33 4 door

post-48887-1212296685_thumb.jpg

  • 2 months later...
  • 1 month later...

has any body tried making the metal coil mount out of a heat resistant plastic. it is the coil mounting bracket that the coils are arcing on right?

i have the same problem of misfiring and it is the biggest b**ch

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • For these last 7 years of ownership, I've always had to use a small scissor jack under one of the front tow hooks to raise the front just enough so my low-profile jack fits under to reach my subframe jack point. I'm beginning to get annoyed of always having to do this. Are there any lower low-profile jacks that fit under the gtr lip on a dropped car?
    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
×
×
  • Create New...