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  1. #1
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    Anyone with a 90hp AHU engined car? I need help with vacuum pipe locations.

    I've just rebuilt my friends 2000 w plate 1.9 TDi. It's the AHU engined 90bhp version. There are vacuum pipes at the bulkhead, and I can't figure out where on of the goes. Can anybody help? I know one of the goes to the egr, and another to the air filer housing, but there is another not attached to anything which I can't figure out. The turbo isn't cutting in, and I hope the 2 are related.

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  3. #2
    Bradderz_1988's Avatar
    Dont replace it, Upgrade it !!

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    Vnt on the turbo or the turbo pressure electrovalve ???
    1999 Audi A4 1.8T Quattro Sport - Volcano Black

    Mods - Frankenturbo F21 Kit - 3" MAF - Saab Reds - THS Decat - Non Res Milltek - ECS Crank Pulley - 034 Snub + Bracket/Gbox Mounts - 1Z/S2 Clutch + Flywheel - 007p - ICM + EVAP Delete - PFR6Q Plugs - S4 B6 345mm Brakes - 300mm Rear Brakes - Goodridge Hoses - LCR Splitter -S4 Bumbers + Skirts/Mouldings - OEM Xenons - Apikol Diff mounts - Polytek'd Rear Diff Mount
    To do/planned -Eibach pro's - GT2871/76R + FMIC + ME7 (maybe) + Engine/stroker Build

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    Anyone with a 90hp AHU engined car? I need help with vacuum pipe locations.

    There is a vacuum valve mounted on the underside of the hard plastic turbo pipe which runs around the back of the engine, it should run to that. Should sort the boost issues, my old B5 1.9 AHU had a boost problem and it was this valve which was the problem.
    Chris "the machine" Green.
    2004 Audi A4 1.9tdi Sport Quattro Avant

 

 

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