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Thread: HELP!!! mystery 4AGE problems

  1. #11
    Site Supporter Javal's Avatar
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    A fucked injector wouldn't be fine at idle and worsen under load. It would be there or it wouldn't be.

    Check ecu, check for codes now.
    You can have any brew you want... as long as it's a Datsun / Corolla / What is that?

  2. #12
    land yacht
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    what if the injector was slightly blocked? wouldn't it just get worse under load?

    how do i check the ECU for codes?

  3. #13
    land yacht
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    cams line up with crank for timing

  4. #14
    land yacht
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    no it is running on 3 and when you attempt to "rev it up" it backfires...

  5. #15
    Veteran driftke70's Avatar
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    check your coil isnt arching out, can be a tiny tiny little spark seen where the lead joins on,

    inlet manifolds can get tiny cracks in them and leak air causing the hunting,
    wheelfriends.wordpress.com

  6. #16
    Site Supporter Javal's Avatar
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    Backfiring sounds timing related.

    If it's solidly running on 3 cyls, see if you can work out which one cylinder is never firing.

    Unplugging one injector at a time while the engine is running is a great way of doing this. If it starts idling worse, then plug it back in and move on to the next one. If it doesn't change when you unplug it, you have your culprit.
    You can have any brew you want... as long as it's a Datsun / Corolla / What is that?

  7. #17
    land yacht
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    it only started idling on 3 after i pulled the fuel rail out and had a check over it

    i put it back in and 3cylinders-r-us

    so that points even more solidly to injectors in my mind

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