93 940 turbo wagon

Discussion in 'Volvo 940' started by Ed, Jun 8, 2008.

  1. Ed

    Ed Guest

    You guys are great. New problem, just started.

    My Tac will become erratic at low speeds or idle. It will very from 0 to
    2000 rpm or more. When is get to highway speeds it reads normal. I suspect
    and electrical problem as the condition changes with lights on or off.
    Blower on or off, etc.
    Earlier I had ask for help on a chirp sound in the AM radio. I'm thinking
    there may be a connection, perhaps in the alternator or regulator?

    Suggestions please

    Ed, Jun 8, 2008
  2. Ed

    James Sweet Guest

    This sounds like a grounding problem somewhere. How's the strap between
    the cylinder head and firewall? There's another ground wire on the
    alternator, and of course the negative battery cable.
    James Sweet, Jun 8, 2008
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