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Thread: AE82 cranks but doesnt start

  1. #1
    Junior Member Grease Monkey
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    Default AE82 cranks but doesnt start

    4AGE bigport 88kw redtop

    Diagnostic code definately seems to say 5-6 but I cant find this code anywhere in the service manual. This could be a problem from when I had the engine changed a while ago and unrelated to this.

    Have checked EFI main relay and all fuses - seems ok

    I put the fuel pump into diagnostic mode and I can feel a faint vibration through the fuel filter but can squeeze the pipe going to the fuel rail which leads me to think the filter is maybe blocked and not enough fuel is getting to the engine/cold-start injector.

    How would I checked if the fuel pump is working, perhaps I should just change the fuel filter and see what happens.

    Any other ideas ?

  2. #2
    Junior Member Backyard Mechanic lojik's Avatar
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    Default Re: AE82 cranks but doesnt start

    Was the engine running poorly in the time before it stopped starting?

    Found this by googling (86 mr2 4agze ECU codes)
    5 = O2 sensor (open in O2 sensor - lean signal only)
    6 = RPM signal (No Ne, G signal within several seconds after start)

    Not sure if they are the same across the board for all 4ag's but may help.

  3. #3
    The Evil Director Backyard Mechanic jfallen's Avatar
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    Default Re: AE82 cranks but doesnt start

    have you checked your coil is pluged to your distributer?

    sometimes the simplest things can brnig you down.

    JOrdan
    Past rides: 86 Hilux, 3x ke55 rollas's (2coupes,) 5th Gen GT4 x2, RA28, TA22 x3, KE10, P610 datto, RT40 corona x3, RT132, MX13

    Currrent: , CA-A22 Celica living life as a Sports Sedan, 2000model ST215W Caldina GT-T manual, RT40 corona.

  4. #4
    Junior Member Grease Monkey
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    Default Re: AE82 cranks but doesnt start

    Thanks for the codes lojik, the car seemed to be running ok before it didnt start but the sensors for this redtop may be slightly different for the ECU.

    The coil pack is plugged in but there is a chance that could be shot too I guess.

    I will investigate further and be back with updates !

  5. #5
    Forum Member 1st year Apprentice
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    Default Re: AE82 cranks but doesnt start

    Hmmmm. There are only 3 main things that will stop any car. Spark, injector pulse and fuel. If you have all three of them and it still doesn't go, take it to your local specialist

  6. #6
    Junior Member Grease Monkey
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    Default Re: AE82 cranks but doesnt start

    Update: Definately no spark from the ignition coil so that and/or resistor pack must be shot.
    Last edited by quiksilv; 16-12-2006 at 11:13 AM.

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