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Thread: HELP!!! mystery 4AGE problems

  1. #1
    land yacht
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    Default HELP!!! mystery 4AGE problems

    hi,

    last weekend i ripped out my old 4age and put in a JDM long motor ( sump to cam covers ) and now i am having major dramas

    i swapped all the ancilleries over from the old motor...manifolds, infector setup, anternator etc etc

    when its in neutral it idles ( idle hunting aswell ) and appears to rev up fine, but when your driving along it feels like crap, mis-firing and massively no power

    and the exhaust side cam cover heats up to pretty damn hot, hot enough that you dont want to touch it.

    cold start works fine

    any ideas?

  2. #2
    Site Supporter Javal's Avatar
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    Misfire under load, eh?

    Check your timing and have a look at your spark plugs to start with.
    You can have any brew you want... as long as it's a Datsun / Corolla / What is that?

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    Veteran slide86's Avatar
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    its not something silly like a blocked exhaust?

    nothing like a rag fell in the exhaust when you had the engine out?

  4. #4
    land yacht
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    checked the plugs when i put them in, they were fine
    and the timing was set between 5-20...but hard to set while its hunting

    exhaust is all clear

  5. #5
    Site Supporter Javal's Avatar
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    No vac leaks?

    Distributor / Rotor button g/c?
    You can have any brew you want... as long as it's a Datsun / Corolla / What is that?

  6. #6
    Senior Member Eddy's Avatar
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    leads pluged in well
    lead from coil good
    i had same problem with my 4ac last night, put the power down and it was crap, one of the leads had wriggled off a bit
    Quote Originally Posted by Nicko View Post
    Why don't you go drive a mates car around until you find a big tree?

  7. #7
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    i know there is a slight vac leak which is causing the idle hunting, but its not big enough to cause this sort of drama

    lead, cap, button all in good condition

    i have a feeling that it might be a fucked injector

  8. #8
    Veteran Kid Karola's Avatar
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    did you figure out what ECU it had?
    RokuSteady : Shakotan - Tsuraichi - Hippari - Onikyan : 神奈川 様式

  9. #9
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    pretty sure its a jap ecu, although i really have no idea, the sticker is almost unreadable

  10. #10
    Senior Member Hen may possibly be a nut's Avatar
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    1 - Check ECU for codes.
    2 - Extra hot exhaust can be caused by cam timing. Check cam timing, and also ignition timing for good measure while you're at it.

    Hen

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