OK,got some parts for a tune up,(wires,plugs,PCV valve,oil )need to get air filter and fuel filter. hopefully this will fix my problem,OH, i forgot to mention,all of my previous problems arose after i had the intake manifold gasket and ECM replaced, are all of these problems stemming from the work i had done before this new issue ? Can replacing intake manifold gasket & ECM cause the engine to run roughly(misfire) ????? PLEASE HELP !!!!!

If your newer fuel pump is acting up, it could be a bad fuel pressure regulator.