745 Catalytic Converter

Discussion in 'General Motoring' started by Randy Hass, Apr 10, 2004.

  1. Randy Hass

    Randy Hass Guest

    My father-in-law is experiencing a loss of power with his '88 745,
    especially when going up hills. Recently, his mechanic replaced the exhaust
    system aft of the catalytic converter. He said that he had a difficult time
    with the replacement. I am wondering if there was a lot of hammering at the
    rear of the catalytic converter, if he could have done damage to the
    "gravel" in the cat causing a blockage. We found a hose blown off near the
    air intake (one with a breather coming off of it) and I'm wondering if he is
    getting backpressure in the system.

    What is the average life of a catalytic converter? This car has 135,000
    miles and I seem to remember they must be replaced about 150,000 miles but I
    could be wrong. Is there an easy test to check the converter? How about
    holding your hand up to the exhaust and see if there is an appropriate
    amount of air coming out? I am going over later to look a little deeper so
    any ideas would be appreciated.

    Randy in Pittsburgh
    Randy Hass, Apr 10, 2004
  2. Randy Hass

    Guest Guest

    Sounds like it yes.

    Guest, Apr 10, 2004
  3. Hi had this happen on a 264 once the muffler clogged up knew I was in
    trouble when a Volkswagen passed me up hill .Sure enough it was full of
    carbon when replaced it went well again .Mind you this is one of the few
    times I will ever confess that I ever owned a !#$@#$* 264 Volvo .
    John Robertson, Apr 12, 2004
  4. replace the muffler and see the diff if it has back pressure full of
    John Robertson, Apr 12, 2004
  5. Randy Hass

    Randy Hass Guest

    Pulled the catalytic converter tonight and found it quite clogged with
    carbon. He is looking for a new part now. If anyone has any ideas on where
    to get a good replacement, please let me know. Thanks for all the support.

    Randy Hass, Apr 13, 2004
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