Ive been trying to fix the same problem for a while. As far as I can figure, It could be almost anything (not very promising is it) Try the easiest and cheapest first. Vacuum lines, fuel filter, Run the expensive gas for a fill up. (actually that ones not very inexpensive) flush your radiator, check all fluids (tranny could even cause this surging) clean throttle body, O2 censor, (If its been driven like my grandmothers car for years it might be carbon build up), Air filter, Your timing might be off slightly, plugs and wires and when that's all done you know it might be something bigger.
I would love to copy and post to every surging question, cause theres a lot unanswered
Where is the origin of the Panama hat?
Have you ever crashed a wedding or had your wedding crashed, if so what happened?
How many times did Joe Biden run for president?
What is the world’s oldest soft drink?
How many novels did Charles Dickens write?
What do the colors on America's flag mean?
How did Harry Houdini come up with his stage name?
What is modal fabric?
What does CTA stands for in ICSE board?
What is distinction percentage in ICSE?
Accountancy is necessary while auditing is a luxury comment?
What is pca in icse?
What mythic past does Toru dutt try to bring in her poems?
How do make a girl tickle me without tickling them or asking?
Is Jeff smith ABC weatherman married?
BA-28 which is a recommended water-skiing safety practice?