idle surging 90 200tqa

[Ron Wainwright]

  Listers,

  I know what you're responses will be but stay with
me for a second patient 90 200tqa,
 car starts fine idles around 1k but when the car gets
warm the idle drops to 500 then 1k then 500 you get
the idea if all hoses are good and the ISV is good is
the next place I should look at the throttle/idle
switch?
Thanks
Ron


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