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!
Would appreciate a recommendation to a shop in the Pittsburgh area that could diagnose the issues I am having with my 2012 Ram 1500 5.7L. I have thrown a lot of parts at it including a refurbished PCM (which fixed one issue).
1. Misfire cylinder 3
2. Preignition or detonation
3. Engine shudder under heavier load