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Glowing red turbo on idle wont rev help please !!!!

Discussion in 'A4/S4 forum(B5 Chassis)' started by ketteringfluff, Dec 8, 2009.

  1. ketteringfluff
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    ketteringfluff New Member

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    Hi all i have an a4 1.8t the turbo glows red on idle and wont rev just hunts and tries to cut out soon as you touch the throttle ive put a brand new throttle body on as i had error codes for it but its still doing the same would i be right in thinkin it could be a blocked cat ? as the turbo is glowing only on tick over ??:banghead:
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  2. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator

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    Yup, blocked cat would be my guess, either remove the 02 sender and see if it's any better or split the cat to turbo joint.

    It should allow enough flow to see a difference
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  3. hardhitter
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    hardhitter Member

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    I would agree, take the cat off and see if it's blocked or collapsed inside.
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