Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
Thanks I like that "learn apply repeat". What I learned is be careful when removing intake manifold. And knock sensors for that engine are discontinued. And I found one at a junk yard. That is working.
