Roger97 Posted September 16, 2023 Report Share Posted September 16, 2023 The tachometer in my 2009 DTS stops working. After a short drive and usually at first stop (red light) and idle my 09 DTS idles rough, tach stops car may stall, then runs rough in restricted mode and NO "check engine light". Any ideas on where to look? Thank you Roger Quote Link to comment Share on other sites More sharing options...
Bruce Nunnally Posted September 16, 2023 Report Share Posted September 16, 2023 Only happens on first drive when cold? Intermittent connection in the richness circuitry for idle perhaps? Or throttle body needs cleaning and idle position re-learn? Quote Bruce 2023 Cadillac CT4-V Blackwing Follow me on: Twitter Instagram Youtube Link to comment Share on other sites More sharing options...
Roger97 Posted September 16, 2023 Author Report Share Posted September 16, 2023 Thank you, Bruce I will check it out! Roger Quote Link to comment Share on other sites More sharing options...
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