Whats wrong with my VG?

Discussion in 'Z Related - Non Technical' started by waynoz, Apr 4, 2013.

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  1. waynoz

    waynoz New Member

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    Anyone want to tackle this one?

    1. we already know no.1 injector has stopped working.
    2. car was running for a few minutes post swap on all 6 and boosting fine
    3. car now runs on 5 and has zero power, sounds like a lawn mower and fuel gussling noise
    4. after reving, drops below 1k to almost stall then picks back up to idle
    5. problem solve and fix my z i buy you slab of beer of choice.

    here's what it sounds like...

    [yt]8nEZYw52A_4[/yt]

    help appreciated!!!

    setup,
    - mainly stock vg30dett with high flowed turbo's
    - tt fuel pump
    - na fuel management thingy
    - chipped ecu to run tt fuel pump off na management thingy
    - new vac hoses, fuel hoses etc etc
    - ecu chip not set with actual car but was posted (wrong tuning settings maybe?)
    - was running off only 2 cylinders, then replaced 3 injectors and cleaned all 6 with new o rings etc.

    I'm hopeing maybe someone might pick from the video what the problem might be since some main issues you could probably hear what it might be?? like a Z wisperer would be great...

    WaynoZ
     
  2. Jinxed

    Jinxed Moderator

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    so you know that its got 1 injector not working, but wonder why its running on 5 cylinders?

    problems 2 through 4 are all becasue its on 5 cylinders.

    solution, get injector working.
     
  3. waynoz

    waynoz New Member

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    I know why its not running on all 5.

    but the problem is it has absolutely **** all power. even when i was driving the na with a blown head gasket I could do up to 70 driving too and from uni which was just around the corner. this thing barely does 10 going around the block.
    plus what is that fuel gussling sound? is that the pump not pushing enough fuel through or what?

    my assumption is that even if its only running on 5, it shoudl still be better than the na with a blown head G. right?
     
  4. Jinxed

    Jinxed Moderator

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    it will be struggling to get on boost with only 5 cylinders running. no boost, no power.

    fuel guzzling sound? not sure what you mean (cant view vid at work) is it just the pump running all the time.
     
  5. Jinxed

    Jinxed Moderator

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    is injector 1 failed in the open or closed position? pull plug after running and check for fuel smell.
     
  6. Sanouske

    Sanouske Retired Moderator

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    Well it sounds like its chugging a bit doesn't it. No funny smoke from the rear or anything?

    Fuel damper?
    Fuel filter?
    Plenum balance tube orings sealing?
    Tested the loom with a multimeter for continuity?
    Used your long screwdriver stethoscope to listen to the injectors?
    Don't have a stock tt ecu or na ecu to test engine function. Mainly just idle and off boost functions...actually scrap the na ecu, you'll need the k value altered...unless you know of one available.
    Cas timing correct?
     
  7. Anti

    Anti 14.7 x 14.7 = 44.1

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    Not sure what you need from us? Get injector #1 working and then reassess.
     
  8. waynoz

    waynoz New Member

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    other thing is that the boost controller is hooked up but has no power going to it.

    so if there is no boost at all on a turbo engine, it won't even run as if its a non turbo? it just doesnt run?

    is the wastegate just closed because of the boost controller which would basically be stopping the engine from running competely?

    yeah its got a constant fuel noise happening but sounds like its struggling, or doesnt sound pretty to say the least
     
  9. Sanouske

    Sanouske Retired Moderator

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    Damn you Ross....getting in first. Lol.

    I would try (with engine off) using a screwdriver stethoscope and putting remote 12v only to no.1 injector and hearing for the click. If its clicking everytime you quickly connect the 12v current, then it would be assumed functioning. Problem being the loom.

    For a total lack of power I think you've got a shitty tune. Or your cas timing is wrong.
     
  10. waynoz

    waynoz New Member

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    some white smoke coming from passenger bank, but minimal and only slight even at higher revs.

    new fuel filter

    everything else you said is beyond my comprehension or ability.



    because I doubt its just the injector, and i'm interested to see if there might be something else that might be causing the problem?
    timing is out and it will need a damn good tune though, thats a given.
     
  11. ABZ300

    ABZ300 G

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    Wayne contact Arvin (pennyarvs) & see if he has any spare injectors lying around. Plus if the sed hasnt been tuned, then its going to run like crap

    Abraham
     
  12. Sanouske

    Sanouske Retired Moderator

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    Do I follow this correctly is assuming it was an na you've converted to a tt?

    And you've already added go fast bits, albeit it electrical boost controllers and such?

    Who helped you install it?
     
  13. waynoz

    waynoz New Member

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    someone else mentioned the loom too, but only 1000k's ago drive time it had all the connectors replaced. its still the na loom, but i'm running a stand alone boost controller so I am told I don't need to use the TT loom in that case.

    definately a shitty tune, basically its not tuned, just been put back together.

    I know this all sounds pretty basic to you guys, but do you think I should tow it to someone who can do a proper tune on it and rechip it with correct timing and everything?
     
  14. waynoz

    waynoz New Member

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    I should have just gotten new injectors off him a month ago.
    Wildzx said he can get the injector cleaned without taking the plenum off which I'm hoping to avoid having to do, but if the plenum comes off, there a few other things i want to fix up again while its off anyway...


    mainly stock apart from the t25 high flowed to t28 turbos, aftermarket hdi boost controller.
    definately is a tt swap.
     
  15. Sanouske

    Sanouske Retired Moderator

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    Ok cool. Don't stress just yet.

    Correct that you don't need a tt loom to run the engine. You don't even need a fancy electronic boost controller to enable the turbos. Just their internal waste gates hooked up to engine vacuum will do its own job.

    But for you to have basically put a tt engine in, replaced the injectors, replaced the loom connectors for new ones. Installed an unknown ecu and now have a now not working injector and poor power. It had got to be the ecu. Without a backyard diagnostic to see if the injector is working, its hard to judge whether the poor ecu tune has pooped the injector, or simply its a bad run and have the injector stick or die.

    White smoke I can assume would be condensation, but could be more. Like unburnt fuel, if I recall correctly. Have you tried swapping coil packs around?

    I'm betting its the crappy tune, at which no mater what you do it will just not work right.
    A failed or stuck injector.
    Dodgy cas.
    Dodgy coilpack.

    And furthermore if the ecu has been mistreated it could fritz any one of these items due to poor electrical signal etc.
     
  16. OZX_320

    OZX_320 Detachable Member

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    You have a TT fuel pump, but with an NA "Fuel Control Thingy"? Going to assume this is your FPCU. How have you managed to convert a 3 speed TT pump to be controlled by the 2 speed NA FPCU?

    You have a TT ECU fitted?

    Cleaned your injector connectors and the injector pins themselves? Retensioned the connector too?

    Boost leak tested?

    S1 or S2 PTU? Adaptor plugs or soldered in? How good a job has been done on that? PTU or coilpack getting hot? (indicative of earth and #1 black wires being ar$e about)
     
  17. waynoz

    waynoz New Member

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    Bingo!

    thats what i wanted to hear....

    look, I'm not betting its the injector, well half is but its more a symptom than the issue.

    ecu was sitting in the bay and rubbing on a belt which was causing spark which was only noticed once it got dark when me and a mate were assessing what was wrong with it.

    only 1 cable was damaged so not shorting across cables on the ecu,

    swapped coil packs on no.1 and did a spark test and all seemed to be fine which led us to belive its a fuel issue.

    so probably crappy tune, or ecu was making it run fine until it shorted then it screwed up the tuning, now I need a new ecu and to retune?

    I'm trying to get hold of XKGB,
    he told me to bring it to him months ago after the swap and he was going to get it tuned and set up for me. if I can get hold of him, i might see if i can trailer it down to him and get it sorted out there, hopefully without screwing too many people around......




     
  18. OZX_320

    OZX_320 Detachable Member

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    Just how was your ECU, which is in the passenger floor pan, able to rub on a belt? You're referring to your PTU?

    What injectors are you running? Stock TT's? You wont need a tune if this is the case.... should run fine.

    Disconnect your PTU, pull the suspect spark plug and crank the motor. (Make sure nobody is smoking nearby) Long shot, but if you're getting a "gushing" noise, you might want to make sure its not an incorrectly fitted/ pinched injector o-ring... which will nicely fill your cylinder with fuel.

    Why didn't wildzx get the car running properly after the conversion?
     
  19. waynoz

    waynoz New Member

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    oh yes, ptu in the bay was rubbing.

    should be stock TT injectors.

    he thought he did, but he's scratching his head about this one like everyone seems too, swears its an injector, but I'm not so confinced that the best thing to do is fill the tank with petrol and rev it off its tits for 20 minutes until it becomes unclogged.

    to be honest it will need a good tune and retune the chip anyway so I am well keen to hit two birds with one stone and take it to someone who has the gear to do all that and hook it up and do a proper diagnostics on it.

    if the plenum needs to come off again i'm going to do a few other bits and pieces in the bay, but priority is to get the thing running, and tuned properly.


    plus Wildzx doesnt have time to work on it, things that can be done in a day take 3 weeks. nothing against him, he just has too much on and has work, trade school, his own projects and a baby project that is at about 90% completion....
     
  20. kawasakirider

    kawasakirider New Member

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    LOL.

    If your PTU is dangling around and ****ing up, I bet it was running on less than 5 cyls man.

    My PTU connector became loose at Queensland Raceway. Looking at it, it looked 100% fine, but it had moved perhaps 1mm and caused 3 cyls not to fire. To the eye, the plugs looked like they were seated correctly and I didn't bother even looking at it until Mike sent me a message to just have a look. I touched it and felt it move slightly, car ran perfectly.

    If it is your PTU and you're not getting spark, you'll also be dumping fuel into your manifold and down into your exhaust, it'll get hot and run like shit very quickly.

    Sort the injector and dodgy wiring out, see how the car runs. If it looks to be running half ok, get it tuned.
     
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