Jump to content
SAU Community

Missfire Boost@4500-5500 RPM - The Answer! (for me at least!)


Recommended Posts

  • 7 months later...

Taping trick worked perfectly for me!

After finally finding the factory hose with restrictor in it for 7psi, once the car was hitting 7psi, was having massive amounts of missfire which wasn't there under lower boost. Pulled the coils out, clear arcing signs on the side of the coil (no cracks though). Gave them a tape up, and now it happily pulls right through!

Hopefully it lasts!

  • 2 months later...
  • 5 months later...
  • 7 months later...
  • 2 months later...

Had a thought today, instead of taping the coils up has anyone tried plastidipping them?

I think they originally designed it as a insulation coating for tools, and it seems pretty heat resistant so I'm sure it would work

It seems the tape doesn't stick well over time, and the ability to layer up the plastidip to get a thick coating means it should be pretty durable?

  • 4 months later...

Don't forget you can always use heat shrink down the "shaft" to the plug,

and/OR make up a set of Acetal coil plates - can't give this mod enough praise!!

I had a problem with misfiring but ONLY under full boost, 24psi, (12psi was fine)

turned out my coil packs were shorting to earth so I made up some Acetal

mounting plates and the miss is GONE, car has never run smoother!!

I got the idea from an overseas forum where this fix was solving heaps of problems for people.

I was actually thinking of making some more up If people might be interested in purchasing them?

IMG_3698e.jpg

Edited by 85URE
  • Like 1

Guess that depends on each persons situation, both financially and physically.

Every coil pack breaks down over time, at this point in time my problem was the coil packs earthing out,

By installing the plates, at a quarter of the cost vs new packs, it did remove my problem.

also allowing better cooling for the packs as the alloy brackets transfer more heat that is responsible for destroying them.

  • 2 years later...

Wher is it that you guys tape up? I recently got new coils but stil habe this problem, have tried everything that i can think of and have found online abut the peoblem exept silicon/taping the cpims (because they are brand new) 

 

  • Like 1

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



  • Latest Posts

    • I couldn't wait But, the black constant tension hose clamps were too thick and there wasn't enough clearance at the T/B and I couldn't get it to seat properly, so I had use a silver one there I also added some 3" silicone over the alloy bit that goes through to hole on the radiator support as it looked like it was sitting on the edge of the hole in the radiator support, I never noticed a rattle or anything, but there was a witness mark It is basicly done, and I can live with the silver hose clamp at the T/B, I will get a black clamp for the head vent though where it is attached to the bulkhead fitting  It never stops...LOL, only issue now with the shock tower brace is it slightly touches the under bonnet liner now, if I leave it it will either wear some paint off the brace where it touches, or damage the liner, so I removed the liner to see what I have to work with, with the liner removed I have about 20mm of clearance, but sadly the middle part of the underside of the bonnet is only dusted with paint and looks crap, so I cannot have that, but.... as I have a roll of Carbuilders premium under bonnet insulation in the garage laying around that is only 5.5mm thick (we were going to use it on the boys Patrol, but he crashed the front of it a few months and it was written off, hence why he now drives my old Honda Accord Euro), I'll use the OEM liner as a template and get the Carbuilders stuff fitted up to cover that dusted paint up
    • You have a knack for photography my friend. It makes the 86 look like a complete bucket. The 34 went with you to Europe and back. It's special. (we all feel the same about our 'shitboxes' that every bystander seems to absolutely love)
    • It's been quite the ordeal but hey, at least you figured it out.
    • The final part arrived today to un-clampify and simplify the intake Who would have though a 1/2" hose stainless bulkhead fitting designed for below waterline bilge pumps would be what I needed Test fit on a 3" offcut I had laying around to see if it would work, and it worked a treat All going well the intake will be on its "final version" tomorrow 
×
×
  • Create New...