Misfire woes | Page 2 | The Z Club of Great Britain
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Misfire woes

Discussion in '280ZX' started by DatsunMan, Apr 28, 2016.

  1. Huw

    Huw
    Z Club Member
    Staff Member

    Not just you Rob. That s what I see too, available when you 'Go Advanced'
     
  2. Rob Gaskin

    Rob Gaskin Treasurer Staff Member Moderator

    So guys do you have to 'Go Advanced' to see the paperclip?

    I don't so that's perhaps why some people can't follow my instruction?
     
  3. johnymd

    johnymd
    Z Club Member

    I've never used the reply button. I just type in the message section and click go advanced, then managed attachement. Its all a bit long winded so I checked the way Rob does it and its much simpler. Chears Rob.
     
  4. DatsunMan

    DatsunMan Active Forum User

    First 3 photos of N-280-MAN on the Isle of Man...
    nope, still can't work out how to do this!!
     
  5. racer

    racer
    Z Club Member

    Just a test, no titillation intended whatsoever :D
     

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  6. jonbills

    jonbills
    ZClub Administrator
    Staff Member Moderator

    You look quite different with your clothes on Matt.
     
  7. racer

    racer
    Z Club Member

    Yeah but what about my new hair do!
     
  8. DatsunMan

    DatsunMan Active Forum User

    Misfire Update!

    After all the advice I've received from members, I have done the following:-

    New Dizzy cap & rotor arm - no improvement

    New Fuel Filter - no improvement

    2nd-hand ECU sourced from eBay - due tomorrow... so I'll soon find out!

    Cheers All
    Regards again, Geoff

    p.s.
    have finally managed to attach some photos...
    paperclip suddenly appeared!


    [​IMG]
     

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  9. DatsunMan

    DatsunMan Active Forum User

    more photos

    hopefully!
    [​IMG]
    [​IMG]
    [​IMG]
     

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  10. DatsunMan

    DatsunMan Active Forum User

    Changed ECU, with one sourced off eBay...

    Car starts & runs, so at least its the right one...

    Although, I did check the numbers corresponded of course...

    But guess what... No Improvement !

    Looks like I need to give up now, & seek help from a garage perhaps?!

    p.s.
    couple more photos attached, now I've gone advanced!!
     

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  11. Huw

    Huw
    Z Club Member
    Staff Member

  12. DatsunMan

    DatsunMan Active Forum User

    Hi Huw,

    Great find... I've just bought it off eBay now, thanks.

    Obviously, my issues remain!
    Even replaced ecu, but no difference...
    Still think it might be electrical, so maybe I should try the coil next?!
    Onwards & upwards...
    Manual will help no end.

    Cheers, Geoff
     
  13. Ped

    Ped
    Z Club Member

    Maybe you should get a fuel injection place to have a look at it. They can usually see where the fault is or is not coming from. I used a Bosch place in Reading. This way you can narrow down or resolve the issue more quickly.
     
  14. monza

    monza Well-Known Forum User

    For the moment the problem still seems to be on 3 cylinders and not a general fault - which means 'general' parts like the coil, air flow meter, should be ok...


    You need to confirm if the injectors are firing on the cylinders where the problem occurs, cheapo stethoscope ( is that the right spelling ? ) from ebay is needed to listen to them clicking.

    Injectors could be gummed up and need removing and testing on bench ( stick a load of redex into the tank )

    Remove spark plugs and with good battery start car as normal ( ie crank it ), do you get petrol mist blown out of each spark plug hole ( small piece of tube to sniff through if not obvious )

    Check the wiring to series resistors and the resistors themselves ( check connections )

    Is there voltage at all injectors when running on 3 cylinders ?

    You need to get the car running on easy start ( 2 man job, 1 man to control flow of easy start and other to keep car running - ) does its run more evenly ( ie all cylinders seem to be firing ). You may need to add easy-start to breather / or other port in intake manifold as airflow meter flap may block flow...

    Could be a fault with the dizzy, as parts of it a cylinder specific..but they normally fail in a random fashion rather than knocking the same 3 cylinders out.

    Have you done a compression test on all cylinders ?, could be valve / piston problem.

    The injection system on the 280zx is simple so i would eliminate the obvious rather than paying someone at a garage to plug a 2015 code reader in to a 1970's ecu that doesn't have a code reader socket.:smash:


    cheers
     
  15. niroshann

    niroshann
    Z Club Member

    Just while you are looking into the suggestions above, I would add that you should have a peep into the fuel tank via the hatch in the boot. Look for residue like flakes of rust. I had an issue where the car would run fine for a few mins then start coughing and spluttering then dies. A minute later it would start and run fine. Turned out to be rusty bits in tank building up and starving engine of fuel then they drop back when the engine dies and allows flow again. Going by the talk about only half the engine firing it sounds like the stuff mentioned above, but I would check this to tick it off before getting carried away..
     
  16. DatsunMan

    DatsunMan Active Forum User

    Update! ok,ok, it's about time, & yes, I forgot to post the conclusion to this dilemma a few months ago!
    Suffice to say, after changing various electrical & fuel components...it turned out to be cured by cleaning the injectors & fuel tank! Including new filter of course, plus additional one fitted. And it's run just fine ever since...
    Better late than never!!
    Thanks again to all respondees
    Regards, Geoff - Isle of Man
     
  17. Huw

    Huw
    Z Club Member
    Staff Member

    Great stuff Geoff, good to hear you go it running at last.
     
  18. candy red

    candy red Well-Known Forum User

    Glad you got it sorted so frustrating

    Derrick;)
     

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