- Dec 4, 2011
- 597
My truck has been "gurgling" while idling ever since the weather turned cold. I seafoam at every oil change, spark plugs are brand new, air intake and throttle body have been cleaned, fuel filter is new. What would be my next troubleshooting step? I just printed off the instructions for cleaning the CPAS, so I will try that. Is there a good enough reason to replace the o2 sensors before they throw a code? I have 105,000 miles on my truck with the original o2 sensors/CPAS. I've also seen some threads regarding a secondary air pump and check valve? Not too familiar with either one of those, but could they be contributing to my rough idling?