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Thread: 4agze wont spark..

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    Default 4agze wont spark..


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    Hey so after trying to start my motor today I realized it is not sparking. I haver wired in my fuel pumps via Cor and that's all I am hearing then the motor is cranking. The ecu is getting power, and the coil pack plugs loom side are getting some sort of reading, ( checking with multimeter ) motor is afm btw. I'm not sure what to check or how to check. I have wired it as per diagram I have and all the earths are fine.

    Is there any way to check to see if I have a dud coil pack or ecu.

    Any suggestions on what to try before I have to strip the loom back??

    Not sure if I am getting injector pulse either.. As I don't know how to check that..

    Any tips will be awsome, the sooner I can fire this up the better!!

    Thanks..
    Last edited by adds; 1st October 2012 at 08:06 PM.

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    I don't have a lot to offer in the form of advice, except that you will hear the injectors pulsing (ticking), put a big screw driver on each of the injectors, put your ear on the handle of the screw driver and listen for the tick while cranking.

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    Yeah sweet cheers will give that a go tomorrow.
    i also read that the igniter gets earthed when it is bolted down, I didn't know this so I might make it earth properly and try again. This might me half my problem.

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    Ok I was just thinking about this and thought that shouldn't I be hearing my fuel pumps when I turn the key to on? I can only hear them when cranking... Is this right??

    Makes sence for them to prime before I turn the key to start

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    with my gze you only hear the fuel pump whine when you hit crank.

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    haha, makes sense to prime before turning the key but it doesn't matter that much in the case of a single intank pump. E90 BMWs, really needs to prime but who actually turns the key to ON, waits 'til the pump primes before kickin' it over? Probably nobody. and that's why they kill fuel pumps on the reg.

    Anyway, do you have 12v at the black/orange wire of the coils?
    do you have 12v at one of the injector wires?
    do you have 12v at the ecu?
    do you have a constant 12v feed at the ecu?

    start there and report back.

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    Thanks for that I will check all that al let you know how I go..

    As for the last 2..what do u mean by "constant 12v feed at the ecu" and "12v at the ecu". ?

    I put the multi meter in and the back of the ecu into the b+ b+1 and the other probe to earth and it gave me 12v is this what u are referring to?

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    Yes.

    Those two wires are black/red yeah? They get 12v when the key is in the on position.

    The white wire will have 12v regardless of what the key is doing. That's why it's called constant.

    Yeah, maybe I shouldabeen more clear. The first three will get power wth the key. The last one will have power all the time.

    Also you need 12v at the black/orange wire at the ignitor. Ignitor needs a solid ground as well.

    Do you have the injector resistor pack plugged in?

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    Yeah the resistor thing is plugged in.

    Thanks for you help, will have a go when I get home.

    Wich pin in the ecu gets the constant 12v? You said white wire?

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    Never wired a gze so don't know. On a bigport it's right next to the black red wire or real close to it.

    Look it up on club4ag. all the pinouts are there.

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