re: Rough Idle on 91 Spider

["bradley artigue" <brad_artigue@domain.elided>]

Check a few things:

1) Air leaks in the hose leading from the big air hose to the idle speed 
regulator.  (the regulator is a barrel on the left side on the intake 
plenum).

2) Pull a spark plug.  If it is bright white then you likely have an air 
leak or faulty air delivery system somewhere.  Look for cracks in the hoses 
and rubber connectors then do # 3.

3) The regulator itself - these seem to wear out after about 10 years (both 
of mine did).  They are not cheap but will likely fix your problem if the 
above do not.

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