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I cleaned up the throttle body and IAC .... All the hoses are good, and I added hoseclamps to kill any vacuum leaks.
But I am still getting rough stumbling when warm ... right at 60 MPH ... and now while waiting at the light. The waiting at the light stumbling goes away when I put it in neutral ... I am beginning to suspect a transmission problem.
I opened the IAC a bit more to increase idle RPMs ... the 60 MPH stumble is less noticeable, but the waiting at the light stumble is now worse.
Arrgh.
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