Found you by searching “How to clean the intake plenum”

Manian1

Test Drive
Location
San Diego, CA
There’s a GREAT post on the subject, and I am so thankful!!

I have cleaned my throttle body, and it improved the idle. Did the relearn procedure. But she’s still sluggish at times, and I could see the soot through the tines on the other side of the throttle body.
 
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