2004 chevy trailblazer ls erratic idle speed, sluggish power when increasing speed, high power preventing speed to decrease bellow 35 when decreasing speed without breaking hard, last obd2 freeze frame :

load% 27.5
Etc°F 194
Shrt ft 1:  2.3
Lng ct 1: -4.7
MAP (inHg)  9.7
RPM   629 
Spark Adv. 13
IAT°F. 72 
TP%   19.2
  • incomplete monitors: catalyst and secondary air
  • N/a: heated catalyst, egr system, a;c refridge.

Please anybody have any ideas what could be the cause, for my to look into

  • Welcome to Motor Vehicle Maintenance & Repair! – Pᴀᴜʟsᴛᴇʀ2 Apr 6 '19 at 3:34
  • I might start with vacuum leaks; the wickedest stuff is often quite simple. – SteveRacer Apr 6 '19 at 8:51

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