I have a 2004 nissan sentra 1.8s automatic with 82,000 miles and it jerks while driving at any speed only for about 10 to 20 minutes after driving, but not every day just about once week or once every two weeks. I have gotten a tune up (spark plugs and new spark wires) fuel injector cleaning, oil and air filter changed, cam sensor and crank sensor changed within the last month, but still jerks. no check engine light is on. Dealership says car doesn't have a fuel filter in it, just a strainer in the gas tank. Before I take it back to dealership to have them fix anything else, can somebody please tell me what could be causing the problem. Thank You very much