JMB RetrofitsEM Tuning
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  1. #1
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    Rumble from rear when reversing

    When reversing with people sat in the back there is a rumbling noise from the rear. Sound like something is dragging on the road.
    There is also knocking coming from the rear going over big bumps but only with people sat in the back.
    Fine without anyone sat in the back.
    Recently passed an MOT with no advisories.
    Audi A3 1.8T 2001 AUM - Custom Stage 2 Map. 3" De-cat Downpipe, 2.5" System, 100mm SMIC, CAI, BKR7E Plugs, Forge Recirc Valve. Uprated Clutch with Lightened SM Flywheel. SAI, N249 Removed, Simplified PCV with Oil Catch Can, Silicone Vac and Boost Hoses.

    Seat Altea 2.0TDi DSG 2004 BKD - Custom Stage 1 Map. Now with new Engine, Turbo, Intercooler, Piping and Radiator (due to Turbo failing and dumping bits into the engine)

    Essentials - VAG-COM. WinOLS.

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  3. #2
    RobinJI's Avatar
    1st Gear

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    Sounds like the exhaust's hitting something under there. It shows up more in reverse because of the way the engine flexes on the mounts. Do you get a knock when you lift off sharply at high revs too? Have a look to see if it's obviously close to anything, doing it more/only with weight in the back suggests that what it's hitting is probably the rear beam.
    1.8 20v turbo converted '88 Scirocco - ASN Build Thread

  4. #3
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    The exhaust is loose at the joint where the back box meets the middle pipe. Looks like some has done a PPR (p**s poor repair) on it.
    Audi A3 1.8T 2001 AUM - Custom Stage 2 Map. 3" De-cat Downpipe, 2.5" System, 100mm SMIC, CAI, BKR7E Plugs, Forge Recirc Valve. Uprated Clutch with Lightened SM Flywheel. SAI, N249 Removed, Simplified PCV with Oil Catch Can, Silicone Vac and Boost Hoses.

    Seat Altea 2.0TDi DSG 2004 BKD - Custom Stage 1 Map. Now with new Engine, Turbo, Intercooler, Piping and Radiator (due to Turbo failing and dumping bits into the engine)

    Essentials - VAG-COM. WinOLS.

 

 

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