Honda Civic DX 1990 I changed an used distributor about two years ago. I have a one-month new clutch and all my valves are adjusted. My water pump and timing belt are about two years. My car ran smoothly for the first week after adjusting the valves, but the same old problem occur after that. The problem is that when I press on the gas pedal unexpectedly, it does not accelerate immediatelly. Some times it does not even accelerate. The engine is reving, but no acceleration. I took to so many mechanic, but no one knows what causes it. Any one has similar problem, please share. Thank you.