A car running rough can be tricky to diagnose. On this episode we reveal a common source of faults that can cause a rough idle or at times a stalling condition, and how to easily diagnose utilizing a smoke tester.
Great Smoke Tester if you will be testing many vehicles (Professional Use) : http://amzn.to/2jm51ol
Smoke tester (inexpensive) : http://amzn.to/2iuX8so
Be extra cautious if you are going to utilize a carborator spray to isolate vacuum leaks (very flammable).