Jump to content
SAU Community

Help Me Diagnose My Faulty Coil.

PIOTREK

By PIOTREK,
in General Maintenance

 Share

Recommended Posts

PIOTREK Proficient

PIOTREK

Posted
Posted

As the topic indicated i have misfire at about 5.5k rpm and have got a second coil pack that i want to fit. However i only want to change the faulty coil. How do i diagnose which is the faulty one?

I would rather not run the car 5 cylinders red line the crap out of it

Any ideas?

Thanks in advance

Link to comment
https://www.sau.com.au/forums/topic/289958-help-me-diagnose-my-faulty-coil/
Share on other sites
madbung Grand Master

madbung

Posted
Posted

Usually the problem is a hairline crack in the coilpack body which allows the spark to follow the path of least resistance and arc to the head. Remove coil cover, move car to a dark place, start car, get someone to rev it while you try to spot which coil is arcing out....replace.

PIOTREK Proficient

PIOTREK

Posted
  • Author
Posted

Moodles2 can you please elaborate on your post. You saying to buy a cable and run it from the ecu to the COMP and i need the program? Where can i download/ buy the cable?

I'm not sure if it will spit out any fault codes cause the check engine light doesn't come on, it is only really mild miss fire but still need to fix it!

iseekool Veteran

iseekool

Posted
Posted

If you have an R34 - Better get a set of new coils (splitfire brand). Once one coils starts to fail the others will not be too far behind.

Best get a new set it will save you hassle especially if you drive far from home alot.

Moodles2 Grand Master

Moodles2

Posted
Posted
Moodles2 can you please elaborate on your post. You saying to buy a cable and run it from the ecu to the COMP and i need the program? Where can i download/ buy the cable?

I'm not sure if it will spit out any fault codes cause the check engine light doesn't come on, it is only really mild miss fire but still need to fix it!

This only applys if you still have the stock ECU. Your Skyline has a fuse box under the steering wheel, inside is the Consult port (aka diagnostic port). With a Consult USB cable (http://ecutalk.com/interface.aspx) you can connect a PC or laptop and read sensor values, do active tests etc as long as you have PC software like OBD ScanTech (free) or Nissan DataScan (commercial), this is a screen shot of Nissan DataScan (commercial version not the cut down evaluation version) with the page to cut off spark to cylinders, effectively disabling them.

datascanactivetest.JPG

mad082 Grand Master

mad082

Posted
Posted

the problem with using the consult method is it isn't that reliable for what he wants to find out. at idle the weak coil may be firing fine and simply switching of cylinders won't find the dodgy coil.

swapping the coils out 1 by 1 will give the most accurate results, however if more than 1 coil is failing then it won't help much.

also, before you start swapping coils around, how old are you plugs, what gap are they, what heat range and what type are they? if you plugs are getting old and worn then they may be the problem and not the coils. in my case when i had a missfire it was caused by the plugs and not the coils.

PIOTREK Proficient

PIOTREK

Posted
  • Author
Posted (edited)

far out i'm confused! lol yer well tonight i'm gonna pull it all apart and see wats happening under there :thumbsup:

Only problem is that it doesn't constantly miss! Last night on the way home it was running fine on full bost and the the red line, but the day before it was missing!

is the r33 series 1 coil pack the same as the series 2?

Edited by P1OTR
Benzino33 Experienced

Benzino33

Posted
Posted
s1 has a seperate ignitor pack (same as r32). series 2 have it built into the coils (same as r34).

Thats right, I put r32 gtr coils in mine wen I had a miss. But does that mean all rb26 coilpacks are the same? or will the r33gtr ones be like the series 2 coils?

Benzino33 Experienced

Benzino33

Posted
Posted
so in short i can't put an series 2 coil in a series 1?

nah man u cant, they simply wont ignite.there will b no connection.

series 2's hav their own igniters on each coil pack but a series one only has the one firing up all 6

Benzino33 Experienced

Benzino33

Posted
Posted
the r33 gtr coils i have seen were like the s1 and r32, but i don't know what year series gtr it was.

ah true,,how many series 33gtrs are there? and wat r the differences

Benzino33 Experienced

Benzino33

Posted
Posted
I have a set of s1 coils somewhere, what side of town are you Peter.

hey, he's mate of mine, he's down Narre side.

Ey Piotr,i got 4 good spare coils if u need, but if ur closer Madbung, go ahead

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • The king 2.0
      Nissan fuga 450gt android screen

      By The king 2.0 · Posted

      It is a kunfine Android screen . Does anyone know the wirering diagram of the fuga ??
    • Nizzy_R34
      r34's love to squeal

      By Nizzy_R34 · Posted

      just an update to this, poor man pays twice  Tried sanding down the pulleys but it didnt do the trick. Chucked another second hand alternator in the na car which I got for free off my mate and its fixed the squelling. Must have been unlucky with the bearings.    As for my turbo car, I managed to pick up a cwc rb alternator conversion bracket + LS alternator for 250 off marketplace, looked to be in really good nick. Installed it , started the car and its not charging the battery.... ( Im not good with auto elec stuff so im not sure if this was all I needed to do but I verified such by using a multimeter on the battery when the engine was running and I was only getting 12.2v )   I had to modify the earth strap for the new LS alternator , factory earth strap was a 10mm bolt which did not fit the bolt on the LS alternator which was double the size so I cut it off , went to repco bought some ring terminals that fit, crimped it onto the old earth strap and bolted it up to the alternator , started the car and same issue. Ran like shit and was reading 12.2 at the battery.  For a "plug and play" advertised kit thats not very plug and play but alas.  My question is , am I missing something ? Ive been reading that some people recommend upgrading the stock 80 amp alternator fuse to a 140 amp but I dont see how that would stop the alternator charging especially at idle not under load.  Regardless ive pulled it out and am going to get it bench tested by an auto elec tomorrow but it would be handy to know if ive missed something silly or have done something wrong.   
    • Duncan
      Engine sputter

      By Duncan · Posted

      My wild guess is that you have popped off an intake pipe....check all of the hoses between the turbo and the throttle for splits or loose clamps.
    • Duncan
      S1 Autech 260RS Wiring Diagrams

      By Duncan · Posted

      Awesome, thanks for sharing!
    • Duncan
      Nissan fuga 450gt android screen

      By Duncan · Posted

      To provide more specific help, more information is needed. What Android screen? What is its wiring diagram? Does the car's wiring have power at any required BAT and ACC wires, and is the loom's earth good?
×
×
  • Create New...