Running like shit

Discussion in 'Technical' started by SRB-2NV, Feb 2, 2011.

  1. SRB-2NV

    SRB-2NV #TEAMROB

    Alright, at a set of traffic lights my check engine light came on and the car started miss firing pretty badly and lost a lot of power... isnt limited to 2500. Ecutalk Display cannot connect to the ecu and just freezes so i can't check error codes. I'm going to try a replacement AFM and PTU but i'm in need of help.
     
  2. Mclovin

    Mclovin Well-Known Member

    Limited to 2.5krpm is your afm, just try cleaning it and all that jazz. ;)
     
  3. SRB-2NV

    SRB-2NV #TEAMROB

    Its not limited to 2500.... I'm going to go over my injector connectors next as my coil packs look all good. Engine check light is constant.
     
  4. rollin

    rollin First 9

    Im saying thanks because the thread title made me lol. ECU talk not interfacing, id check ecu plug, disconnect, contact clean and reconnect. Other wise try a spare ECU.

    PTU is always a good way to go, AFM wont be a problem, disconnect it if you like, should still idle and run to 2.5k
     
  5. ross79

    ross79 Member

    Is your ECU socketed? If so, open it up and make sure the eprom is seated properly.
    I had this same problem when the chip popped out of my ECU.
     
  6. Benny_C

    Benny_C About as subtle as...

    Yes. it's an ecu issue. You're running in "failsafe" mode. Let me guess, your auxilery fan is running also while your engine check light is on?

    As said earlier, check ECU connector. Check PTU connector. If your ECU is socketed, pop it open and check the Eprom is seated properly and no corrosion around it (also a general inspection of the rest of the components in there will help to make sure there's no obvious dry joint or component that's clearly flagged).

    ...on a side note, check your ENGINE CONT. fuse in the pass side of the engine bay fuse box. If that blows it can have interesting issues regarding running and dash lights too.

    That's a starting point anyway, once this is done, post up again and we can go from there.
     
  7. SRB-2NV

    SRB-2NV #TEAMROB

    Yeah i just tried Ecutalk with a laptop and no go. Seems my nistune might be playing up or have jumped out of its board? Will have a look thanks a lot guys
     
  8. Vader

    Vader Just another guy

    +1 ECU or ECU daughter board.
     
  9. SRB-2NV

    SRB-2NV #TEAMROB

    Turns out its heat related guys, i turned the car on now and it runs perfectly..... i guess the 40 degree heat here has had an affect on my NIStune board.
     
  10. Benny_C

    Benny_C About as subtle as...

    Hmm, well heat related issues are usually due to expansion and contraction of joints/components. If your ECU/Nistune daughter board is showing these symptoms, then i would investigate further. (i've never heard of an intermittant heat related fault on a Nistune before). Still wouldn't hurt to crack the ECU open to make sure everything is seated properly, and the daughter board wire are soldered or secured properly. End of the day, you don't want this happening again. :)
     
  11. Vader

    Vader Just another guy

    It gets to 40 here without anyone saying their car just dies. I say definitely get it looked at.
     
  12. SRB-2NV

    SRB-2NV #TEAMROB

    Will be getting it checked out by Yavuz at unigroup engineering tomorrow as he is the one who installed the board.
     
  13. Mclovin

    Mclovin Well-Known Member

    Opps should have read that better. :eek:
     
  14. Neo

    Neo Member

    Hi my Z was running like shit too and it turned out to be the fuel computer dry solder joints on the transistors and a faulty capacitor.You could try the fuel computer bypass to check that as i did.:zlove:
     
  15. Vader

    Vader Just another guy

    search for FPCU bypass, not "fuel computer" ;)

    It's simple as... open up boot, lift spare, open lid, unwrap electrical tape from around cable, find white wire, short it to earth.

    Done - bypassed.
     
  16. SRB-2NV

    SRB-2NV #TEAMROB

    Problem is back, i'm removing the ecu and taking it back to unigroup to see if its the problem.. also have a spare PTU to try. Only problem i have now is the car is hesitating very badly, i have petrol pissing out of my fuel filter and the car is blowing black smoke so i think the filter will need a change along with plugs etc but i'm stuck till tomorrow. Also yesterday the timing on my ecutalk display hit 62* so i'm hoping the motor will still be ok after getting fixed.
     
  17. TWIN TERROR

    TWIN TERROR Well-Known Member

    Fuel pissing out of fuel filter is NOT GOOD. Go and buy another filter and replace it before starting car again or it might catch fire. Super Cheap / Repco should have one and it's a 5 minute job to do.
    Cheers Dave
     
  18. Benny_C

    Benny_C About as subtle as...

    Jesus Christ, first thing to do is replace your fuel filter! NOW!
    Then, do another check after that is done.
    Also, you don't need a catch can. If you're getting that much blow-by to need one, then you need a new set of rings.
     
  19. SRB-2NV

    SRB-2NV #TEAMROB

    Alright, had the NIStune re-soldered, changed the fuel filter and took her for a spin and everything seems fine. It was miss-firing slightly at first start but after taking it for a spin it quickly evened out and ran smoothly. Heres hoping it doesn't happen again!
     
  20. Jinxed

    Jinxed Moderator

    if the fuel filter was leaking fuel, then it was probly badly blocked up, and was the likely cause of the initial hesitations you experienced
     

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