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Faulty Coils? Misfire At High Rpm? Read This.

Zahos

By Zahos,
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madaz R33 Proficient

madaz R33

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Posted
hi all, I have had a good read of the 7 pages of thread on this topic as my R33 is missfiring between 4000-5000 rpm, I checked the spark plugs and re gapped them down from 1.1 to 0.8 to begin with, I then pulled the coil packs out and checked them for fine carcks- none visible, also no visible grime on the copper-all clean(i think as i only did a quick check)my boost is set at 13, do u think my standard ecu is shitting its self? or there is a cracks in the coil pack? The car goes hard until 4000rpm and sorta hits a dead spot until 5000rpm and will have a missfire, the "flat spot/missfire is not all the time but mostly when laying the foot down, so go back and thouroughly check coil packs and clean the copper in them? thoughts would be appreciated, cheers Damo. p.s I am just getting ready toput a bosch 040 fuel pump and a regulator in then put my pwr fc in and have it tuned am i better off to just say f**** it and buy new coilpacks any way??

before i went mucking around again with the coil packs again i turned down the boost to 10 psi all was ok until i planted it and resulted in smaller missfire at 3000rpm cleared at 4000rpm--gotta be the coilpacks im thinkin

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Zahos Mentor

Zahos

Posted
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Hey Damo

the cracks aren't always visible on the coil packs.

Just slap heaps of Araldyte as shown in the dodgy pic on the first post on all of them, it will only do good...

also, clean the contacts where the spring sits with some carby cleaner, even if it looks clean.

Wind your boost back up where it was, and give us a status report when your done.

I'm guessing the flat spot will remain - that's a problem with the tune on the stock ECU, but the misfire should go.

madaz R33 Proficient

madaz R33

Posted
Posted (edited)
Hey Damo

the cracks aren't always visible on the coil packs.

Just slap heaps of Araldyte as shown in the dodgy pic on the first post on all of them, it will only do good...

also, clean the contacts where the spring sits with some carby cleaner, even if it looks clean.

Wind your boost back up where it was, and give us a status report when your done.

I'm guessing the flat spot will remain - that's a problem with the tune on the stock ECU, but the misfire should go.

thanks for the info man, but if im going to keep going through with mods (which i am) the coil packs are going to need to be replaced anyways eh?

Edited by madaz R33
Zahos Mentor

Zahos

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thanks for the info man, but if im going to keep going through with mods (which i am) the coil packs are going to need to be replaced anyways eh?

only if there is internal damage to the coil itself, which is pretty unlikely.

i have spoken to 2 guys with 300rwkw monsters with the standard coils covered in araldyte, they have no issues.

it costs virtually nothing, so it's much wiser to give it a try rather than spending $600 without trying this first.

  • 2 weeks later...
madaz R33 Proficient

madaz R33

Posted
Posted

went down to the local store and picked up the sellys Epoxy resin 5 minute stuff (full streangh 12-24hrs) and noticed it had a max tep of 93 deg looked over at the same brand in another tube and it states for plastic welding applications with a 148 deg max temp. it did state it could not be used with polypropylene or polyethylene. so im holding off until i get someone else's thoughts cheers, what is the operating temp of the coil packs???

Aif Collaborator

Aif

Posted
Posted
well, I generally mean in 2nd. you know, sometime you'll just floor it all the way through to redline to get to 100. I only do this to make sure the car is running ok. for quite a while when doing this the car has felt a bit weak. the hesitation is really annoying. just cant work out the exact problem. The majority of it has developed since i installed an FMIC tho

i had hesitation with my FMIC, i had a few problems :thumbsup: air line melt shut and cause boost spiking also check that u dont have any air leaks, and you have the correct plugs (.8 gap) and the plugs are the right heat range.

  • 8 months later...
  • 6 months later...
Robbie1717 Rookie

Robbie1717

Posted
Posted

Hi Guys

just did the taping up thing on my CoilPacks in my R33 GTS-t today.

used some self algamating tape in the whole coil apart from the wiring connection and where the spark plug goes in.

so far the car is running much smoother no popping and banging 4/5.5Krpm.

it even seems to be using less fuel.

is this at all possible or am i imagineing this?????

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