Running on 3 cylinders ....

Discussion in 'Technical' started by Quinny, Apr 27, 2006.

  1. Quinny

    Quinny New Member

    Re: How about the Injector earth !

    Injector earth strap was reinstalled. It looks pretty crappy though. I thought about replacing it but could not get the screw out of the rack, so gave up.

    I thought that it could be an earth problem, so I removed the battery and disconnected the earth cable from the motor and gearbox. This appears to be a pretty poor set up to me as the only earth to the ECU appears to be from wires connected to the plenum, whilst the main earth strap goes to a sheet metal bracket at the back of the motor and then to one of the bell housing bolts. Anyway I removed all these earth point fasteners, filed the connections clean and reconnected with no improvement.
     
  2. Quinny

    Quinny New Member

    Re: i have a simular problem

    I tried one of these out tonight and it gave odd results, see my seperate topic. Please describe the flashing that you saw on your vehicle.

    Thanks.
     
  3. Quinny

    Quinny New Member

    Bump...

    Help still cannot fix.

    Anyone else got a bright idea?
     
  4. minivan

    minivan Guinea Pig Test Monkey

    have you redone the job that caused this problem in the first place?

    if i do a job, and straight after the car is rooted.. i will undo everything i did and redo it to check.. while your there you my atleast realise soemthing you bumped off. but for 3 cylinders to not be firing that arent even related to each other.. it has to be injectors or coil packs.. and you say the coils are fine.. which means you must have done soemthing wrong when you wired up the new plugs.

    our injectors arent anywhere near big enough to fire sequentially.. i'm still stumped on that one.. you need injectors atleast twice the size for sequential over batch firing.. (batch injectors always have their earth running back to the injector driver by the way)
     
  5. black baz

    black baz black 'n blue Bazemy

    doesn't quinny have a concurrent thread running ... where he found

    that 3 injectors were stuffed ......????
     
  6. Quinny

    Quinny New Member

    Re: doesn't quinny have a concurrent thread running ... where he found

    Well sort of...

    I finally repulled the plenum last night and confirmed that 3 of the injectors were most definitely not working.

    I even reconnected the fule lines after the plenum was off and turned on the ignition. Turing the Cam position sensor some injectors squirted and some did not.

    I then applied 12 volts to the terminals of the injectors with a drill battery to be sure that it was not my wiring or the ECU that was causing the pronblem. The injectors that were fired by the ECU also fired by the external source the others did not.

    I have returned them to the mechanic for recleaning.

    Moral to the story: Have the injectors cleaned immediately before being put into the car and run.
     
  7. minivan

    minivan Guinea Pig Test Monkey

    Re: doesn't quinny have a concurrent thread running ... where he found

    where were you storing them? in a bucket of sand?
     
  8. Quinny

    Quinny New Member

    Re: doesn't quinny have a concurrent thread running ... where he found

    Nope,

    sitting on a shelf wrapped in a rag.

    It seems that whatever they used to flush dried out and blocked em up.

    No charge to reclean and I reinstalled last night.

    Soon know the results of the process.
     

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