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Thread: z20let conversion gone wrong

  
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    kidda12345's Avatar
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    z20let conversion gone wrong

    I'm a bit new to this but can anyone help iv fitted a z20let out of a rear ended mk4 gsi into a mk4 (originally a 1.8 sport) changing engine , engine loom , engine bay loom , dash loom , clocks , ecu , timer ecu , fuel pump and other miner things and the thing wont run right also the air con has been removed .in the old car it wasn't boosting and an ecu check said a solenoid which has been changed .but now its all been fitted in new car it gives multiple readings IE lamber sensors x 2 , maf , coolant Spenser both the maf and coolant sensor give a permanent reading of -40 on a actual value test the car runs but pinks due to running lean and boosts but don't hold just cuts straight out i know there is some very cleaver people on here who will probably tell me its something silly but with Xmas and cold weather the things getting close to having a severe beating with a trolley jack handle lol please can someone advise me . .

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    what actual fault codes are you getting?
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    not sure on code numbers but from what i can remember heater faults on lamber sensers maf short b+ coolent senser short b+ somthing to do with vaporiser solinoid and boost solinoid il get m8 round and post the codes tomos

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    codes would be helpful cheers mate.
    NOW - Sapphire Black 3dr Astra G

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    Sounds like either your loom is messed up or a big earth is.

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    Sounds like a loom/earth issue as a low temp reading would result in over fueling not under.
    Tell me what you've done, not what you're going to!

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    wont be able to get ecu codes till next week now .and the only part of the loom i didn't change was the one to the back of the car but lights fuel pump and other things work fine IL double check earth points the only other thing i noticed was a black wire coming out the loom by the battery tray not leading any where any ideas

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    Would need pics to tell you that to be honest.

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    That black wire by the battery tray sound like a earth that connects to all the sensors so that could be the fault there.
    Need a pic of it really
    SMIC, miltek catback, precat, Thorney remap 242.7 bhp 281lb/ft torque

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    black is ignition live normaly
    courtney stage 3 zafira,Mitsubishi evo geek mapped to 389 and 470 lb of torque

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