Idle too slow at stop
Is it not a stop-and-go engine design that is supposed to stop? Too low to run the accessories and keep running? Many things are probably off, and a tuneup to get all the sensors. belts, exhaust performance, breather valve etc. working in unison is called for, but perhaps a loop on the interstate (plus pre-cleaning it yourself with a rag, having gotten to it via 2 screws) could help clean up the EGR sensor and get it cheered up until the next garage appointment you can make. Another classic reason is that the idle rate thumbscrew got played with, or a hole in the exhaust.
Hi Rich what make model an year vehicle ? Most vehicles have a IAC valve or motor - idle air control , There is a passage in the throttle body an this valve opens an closes this passage allowing more air past the throttle plate raising the idle ! This passage gets plugged by carbon an needs cleaning to restore the idle back ! Idle Air Control Valve How to clean throttle body and Idle air control valve iac There is no means for idle adjustment , the engine PCM controls It !
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Hi Richard Gorenflo, I want to help you with your question, but I need more information from you. Can you please add details in the comment box?
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