I replaced my head gasket and my car has a rough idea when you start it and it stalled out
What is your question?
What could be the problem when you give it a little gas it clears up then when you let off the gas it starts to run rough again and shake real bad and then it stales out
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Many variables since you just did the head gasket. Could be a bad spark plug, motor mount, air leak. This will require a full inspection to be sure.
Alex