Re: Oh no, multi codes = valve problems? (123, 300, 302, 303, 351, 352, 1193)
I agree something is not right with the mechanic. You would know if you had two cylinders out by the "chug chug chugging and bucking" of the car.
You can always take the intake off (so you can better get to the spark plug holes)and use a cheap compression tester ($15-$30 Harbor Freight Special) and verify it yourself.
My guess is the cylinders are O.K. and there is another problem.
James
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